Is there a way to unlock bootloaders on the newer Samsung AT&T phones, or was the S3 pretty much the last usable phone in that line?

I think you completely misunderstand the point of the replaceable battery I use. I don't ever switch back to the original battery. The after-market battery I put in my S3 has something like 4x the capacity of the stock battery. It takes up more space and sticks out of the back of the phone. Because of this, it includes a case back that makes the phone a bit thicker than stock, while doubling as a protective case similar to an otter-box. I no more want to swap batteries in and out day to day that I want a second phone-sized object dangling from my phone by a tiny cord.

You realize how stupid it sounds to charge a battery with a battery that needs charging itself? Not to mention most of those basically hang from your phone by the USB cable, with no way to actually attach it to the phone?
The battery I have basically replaces the back panel of the S3 with a larger back panel that doubles as a pretty good phone protector case too. Realistically, the whole combined size of the S3+big battery is no thicker than my wallet too.

I've really been a fan of many things Samsung in the past (TVs, LCDs, even my Blu-ray player is Samsung) and at some point I'm going to replace my Galaxy S3. The S6 is now NOT an option because of things I really care about: user replaceable battery - I use the 4x sized ZeroLemon battery from Amazon), removable SD Card, and the ability to easily root (Not sure what Knox and stuff has done to the newer models).
Is this going to make me trade in my S3 for an Apple phone? No way. Absolutely not. Apple is even worse with all these important features. It doesn't matter how much they give me in "trade in" it's still probably less than I could get just selling the phone myself anyway.

Why can't they just go full Bluetooth like Wii/PS3/PS4 controllers? It's pretty annoying to have to get a special dongle on a long wire to use an Xbox360 controller on my laptop that already has built-in Bluetooth.

What's new is the incredible relevancy of years and years of native Windows programs. Android and iOS's app stores are mostly piles of Free to Pay junkware and a handful of big name useful apps. Putting a keyboard/mouse/monitor onto an Android/iOS phone is basically useless. Having a phone that runs all your favorite Windows apps, while basically replacing your desktop/laptop computer with a KVM dock is a HUGE breakthrough. It has to run x86 Intel Win32/Win64 apps though, without emulation or any weird issues.

media.mediasource.enabled, media.mediasource.mp4.enabled, media.mediasource.webm.enabled, and media.mediasource.youtubeonly.
Everything but webm.enabled is defaulted to true in FF 37 Beta now. They were defaulted to false (except youtubeonly) in the later 36 Betas and 36 Final.

I think it was backed out, due to problems (I noticed pretty major audio sync problems myself, but it otherwise seemed to play 1080/4K/60fps videos just fine on YouTube).
You can go enable the prefs in about:config if you want to try it out. I'm pretty sure the code is all there, just turned off by default still because of bugs.

With the whole 2-year contract things, most people can basically never have their phone unlocked for international use until it's time to upgrade anyway. Locking phones should just be illegal to begin with. If you sign a contract saying you are going to pay for service for 2 years, you have to pay for that service (or pay an ETF) regardless of if your phone is locked or not.

I still don't get why modern languages don't include an optional numeric for "break" statements. A simple "break 3;" would be a lot better than a "goto".

Yeah, but until more people start using "photovoltaic cells" and "concentrated solar power", whenever people just say "solar", it's going to be somewhat ambiguous. One of these things probably has a lot of room to be developed into something inexpensive, small, and efficient, while the other is basically a dead-end technology that is just a short-sighted a waste of money.

I'm not actually worried about the handful of birds so much as I just think CSP is a waste of money that could better be spent developing cheaper and more efficient photovoltaic cells.

Is this the kind that incinerates all the birds that fly by, just so it can boil some water in a central tower?
Or is it an actual solar cells of some sort that directly produce electricity?
They really need some sort of better name to differentiate between these...

Yes. All land should be rented, never bought, for basically the annual property taxes. If land becomes more valuable, property taxes should go up, and if you no longer want to rent that piece of land because it's too expensive, somebody else can.

I pay $45/month for Comcast's 25Mbps Internet (which may be called Performance Plus or Blast depending on the market I guess). I get 30/6 on speedtests. I also get free HBO Go because that $45/month includes a tv box for basic cable that is still shrink-wrapped sitting in the corner somewhere.