Sina

Bunsenlab Linux I suppose, but do know if it's the single for atom version web browsing will be very slow and YT will only work in 240p after spending 10 minutes loading and you gotta use Chrome.

Mine has a Windows XP dualboot for retro gaming and Office 2007 flies on this thing. (Though it's not very compatible with newer versions of office)

Retro gaming is the best use case including ps1 emulation. I've been thinking of putting native dos on it, because some dos games are lagging in dosbox. (like imperium galactica 1 and even Prehistoric 2..)

Bluefin/Aurora is the most sane option in that space, stock Silverblue offerings are lacking a few essentials.

Because Linux +firefox is like a fingerprinting wet dream, I may be the only one in my locale. (maybe not anymore, but yeah)

Also Librewolf by default reports Win+Firefox.

Statcounter considers me a Win user due to the Win user agent I'm using, this is not a rare behavior in the Linux space..

Probably not significantly less secure than Xorg itself, I wouldn't mind using in your place. DE security is usually not a huge problem, if someone can exploit these vulnerabilities usually you are quite bonked.

Remember most of what happens on screen is xorg, the wm is a simply interacting with xorg and other parts of your DE are simple user level programs like the panel etc..

Will it work on X? xd

These days it's mainly snap and how you can type apt install and the system will do snap install instead, for firefox for example.

in the span of a single month is next to zero

It's much higher than zero, if let's say your ssd goes kaput & you try moving everything at once to a new one. That action by itself comes with risk, especially if the usb stick is very large & manufactured after covid. There is also the bit rot issue, usb sticks are useless as backup solutions for any use case, it's just a false sense of security.

I believe i can self-host a matrix client but no idea how well it will work with people currently having notifications by discord bot on their phone

In my opinion discord is not yet enshittified enough for these problems to be easily solved. Give it a couple more years, if matrix gains just a bit more traction, the scaffolding to do stuff like that will be worked out.

So do I need both hands to count all the gold atoms? ^

I would argue that using an image based system with flatpak is one of the best ways for newbies to transition to Linux. Whether that's SteamOS, Bazzite, Bluefin or Aurora, that doesn't matter all that much.