I don't see how being an extro- or intro-vert has anything to do with the capacity to actually sit down in fucking peace and quiet and think. I start to wonder how anyone achieves anything substantial in this world if they can't deal with 15 minutes of peace and quiet and their own thoughts.

A conduit-shaped opening through a concrete 3D-printed structure could surely be coated from inside with a slick coating before anything is pulled through. All you'd need is to pull a spray head through it. You don't need to embed pipes in concrete.

Chopped fibres aren't the same as long fibres. But I agree that having fibreglass ribbons embedded in the concrete would be a great alternative, as long as long as test coupons would pass relevant tests.

Under watch is OK, but that's not the same as in jail.

Once you have a positioning system (a manipulator) good enough for 3D printing concrete, then adding rebar functionality is peanuts in comparison. Heck, not doing so would be silly, since you should try to leverage the heck out of the expensive manipulator. I personally don't see much housing uses for non-reinforced concrete. As the ground settles, it will crack. Rebar is a relatively cheap fix for that.

Well, if they can solve the problem of rebar, then buckling won't be an issue anymore, since rebar has proper strength from the get-go. I don't really see a slower machine being much better than a fast one. The overall size of the machine depends on what you fabricate, not how fast you go about it (within reasonable limits of concrete pouring).

If I were to make a product out of it, I'd have a 5 axis machine with switchable heads. One head with an extra axis or two that can put out, restrain, cut and spot-weld rebar. Another head that can print concrete. With a 5 axis machine you can trivially print concrete on the surface of rebar going in any orientation. Heck, if they use a mix with fast initial cure, they can do skin/infill just like plastic 3D printers do, except that the infill uses a less viscous mix that self-levels. This could dramatically speed it up, and you wouldn't need to print around every piece of rebar but only some trickier ones.

This could be very much a breakthrough technology, but it would need a bit of capital investment as those machines wouldn't be cheap. For very large constructions, instead of X-Y-Z linear actuators you would need a delta-style arm. Even a big one could be assembled on site and print an entire highway overpass in a week or two, starting with nothing but a hole in the ground.

You're not really seeing 3D printing for what it is. It shouldn't be all that hard to design a printer to deal with vertical rebar. It needs to be a 5 axis machine, but printing concrete on the surface of rebar should be no biggie. Heck, the rebar structure to be printed on can be also "printed" by a machine that can cut, locate and spot-weld rebar. The conduits are plastic only because the usual pouring method needs something to contain the void while the poured concrete is curing. With 3D printing, you just print the voids and you don't need any conduits.

No different from a brick building, really. You can use brick in some places, in some other places you can't. Hopefully here they could use brick :)

You're forgetting buckling, and weak, fresh cement is famous for buckling. Heck, poorly supported brick walls will buckle and collapse during construction because the mortar isn't strong enough -- all the while the same will will stand just fine once the mortar has cured.

This technology eventually can do the whole thing starting with a hole in the ground, all in one go. About the only problem that I see is with the lack of strength of the concrete. They'll do it wrong, it will buckle while it's being printed, and the outcome will be in terms of the number of body bags. I sincerely hope that their printing software keeps a running estimate of the weight of concrete printed, and that their structural people have vetted it.

Here the reviews are a result of a transaction that took place and come from the parties to that transaction, not from random people who just want to vent. Every review has a grain of truth to it - if nothing else than to the state of mind the writer was at the time of reviewing it. Sure, some people get pissed by the littlest of things, and that character trait of a passenger is useful to prospective drivers, for example. So, I'd say that the review system works just fine, you just can't be a doofus when reading the reviews and taking everything at face value.

So, lack of focus and multiple shitty apps instead of one good one is somehow good? The heck?! I don't care about a call center, personally. I can type it in better than some phone jock can write it down. As for complaints - do you post each complaint publicly? Because, see, the public review systems work that way, and I'd rather have it public than hidden. There's zero transparency to your complaint resolution process. Logistical advantage, ha ha.

This is the funniest shit I've read in a while. I hope you're not serious. So, how many cab rides a day do you take, and where exactly?

It's worse than that. The regulation is totally ass-backwards. Flying anything small without FPV is hard and inaccurate, and, presumably, also less safe. I've personally looked through an FPV system installed in a plane that was flown line-of-sight by an experienced pilot doing it the old fashioned way. And all I have to say is that it was some very shitty flying. Sure, if you look at it from a distance, it looks "great". Yet when you see the VSI and the artificial horizon, you can't be but all "the fuck is the pilot on drugs or something?". Understandably, the accuracy of flying decreases with the distance, as gain in the pilot's visual feedback loop decreases with the decreasing size of the plane on the retina. It may be that the video is not quite necessary, but remote VSI and artificial horizon is a must, and those are, in one form or another, the mainstay of FPV.

In many, many places in the U.S., you really want to have a lawyer if you as much as get a speeding ticket past a certain overspeed threshold (say 20mph). The $200 you'll spend on a lawyer is way less than the insurance premium increase you'd get if you didn't get you case pleaded down. Never mind that some judges handle pro se cases with thinly veiled prejudice.