So they are saying that if they use a clock on the moon their local time will drift w.r.t a clock on earth. Isn't that even more of a justification for using a clock on earth as the reference for everything ?

It's not as if you can't build a special clock that can factor in the timing differences and get a radio signal from earth to keep it in trim.

I thought this was the promise of RFID; instead of self scanning through those shitty slow barcode readers, the whole cart or basket could be scanned in an instant provided products were tagged with rfid.

The only need for the monitoring then would be to make sure RFID tags are not sneakily removed before walking out (a choice of products to sell might help).

Seems to me that most people enrolled in the system are likely honest and mistakes etc. could be mitigated with spot checks. And the blatantly dishonest are shoplifting and probably not enrolled in the system anyway - there would need ot be a different approach to that

In my lifetime batteries have become 10x (at least) more powerful, lights much brighter, cpus faster, magnets stronger and so many other limits of materials science have been breeched. It's great to see the new possibilities with these new resources, but I think the previous limitations gave rise to better solutions.

I'd prefer to see a 10x increase in LLM training performance come from an order of magnitude improvement in the training algorithms than from so much more server capacity coming online. Adding all this horsepower just makes the systems so much more energy hungry and promotes experiments that perhaps lack merit