NameOfWhimsy

For what it's worth, the multi-user experience in my case has been pretty seamless. Here's my setup if it helps anyone:

My roommate and I both have separate steam accounts (it sounds like you may be looking for a 'child' account or something like that, those may be a thing but I'm unfortunately completely unfamiliar with that, so ymmv if you use that).
We set up family sharing between us to access each other's games, but did that I think entirely on a computer via that steam client. No pins or anything were necessary iirc, just a slightly convoluted sequence of logging in and out of steam on the same computer and clicking the needed 'family sharing' buttons.

Then I set up the deck with my account, logged out, and had my roommate log in. There's an option somewhere to start the steam deck at the account select screen every time it turns on rather than automatically logging in to the last used account.

It sounds like most of the difficulty is coming from the family sharing setup. Like I said, I'm not knowledgeable on if steam has 'child' accounts that can be linked to other accounts, if so it's possible that none of what my process was like applies.

Hopefully that's at least somewhat helpful

Rankine gang rise up

I know iFixit sells screw extractor bits that apparently work well, though I haven't tried them myself: https://www.ifixit.com/products/precision-screw-extractor-set Might be with checking out these or something similar

If it started: 0.999... = 1 - lim(1/n) then maybe we can talk, but I have no idea where 0.999... = 1 - lim(1 - 1/n) comes from, that's just incorrect

"I thought that by stating that I would not tell lies, that I would be giving you more accurate information"

If you just believe in yourself enough, you can make anything you say true!

It's kinda cool (to me at least lol) how literal the terms "additive" and "subtractive" for color mixing are. With additive mixing (such as on a computer screen), you start with black and add the primary colors (RGB) in different combinations. If you add all of them you get white.

Subtractive mixing (like pigments) starts from white and "subtracts" those same RGB colors. You can think of cyan, magenta, and yellow as "minus red", "minus green", and "minus blue" respectively, since that's which wavelengths thise pigments absorb. So mixing cyan and magenta for instance gives you "white (RGB) minus red minus green", which leaves only blue.

Just to clarify, with pigments (subtractive color mixing) the primary colors are in reality cyan, magenta, and yellow, which is why printers use CMY (and K, which is black). Blue and red are kinda close to cyan and magenta though, so those are sometimes stated as the primary colors along with yellow even though that's not exact

Firefox with uBlock Origin has been working well for me, for ads at least. I haven't looked too much into blocking trackers but I think Firefox has some ability to do that

I don't have a whole lot of experience with different racks, but I did pull the plug on a 12U one recently. It surprised me how much it helped with organization and cable management. I knew it would make those easier, but it instantly solved all of my previous organizational woes.

Definitely recommend!

APC also has pretty good UPSs from what I've seen

Assuming you mean a power strip like this it doesn't really matter what you get. There's no way you'd overload the power strip unless you have a ton of crazy high-end stuff going on (fwiw my setup is a couple mini computers, a couple monitors, and a decent midrange desktop plugged into a single power strip and the whole thing never pulls more than a few amps).

If that is a potential concern, just make sure the one you get is rated for at least the amount of current you expect to pull. Many if not most off-the-shelf strips are rated for at least 10 or 12 amps, and that's almost always way more than enough.

This is cool and all, but Wi-Fi and Li-Fi are equally "light-based", it's just using different frequencies. A higher frequency means potentially faster data transmission, but at the cost of faster attenuation. We see this with 2.4GHz vs 5GHz wifi already, and this sounds to me like a more extreme version of that