It speaks to your willingness and eagerness to tinker with your systems, that's pretty much arch's core audience.
imecth
If you like to mod games you'll probably want arch linux as it's heavily modular - you choose everything. You can use the archinstall script to get you setup or follow the installation guide.
It's not, physical sales have been dwindling in general, although part of the reason for that is the push towards digital.
The solution here has never been to keep producing disks, what we need is proper digital ownership laws that let you resell game keys and force stores like steam to disentangle them from your account.
Path of exile 2 was at its hardest in 0.1, at this point it has fully embraced power creep and it's going in the same direction as poe1, less challenging content and more clear screens with 1 button to get loot.
It's not particularly difficult to read, there's just a lot of stuff to keep track of - if you care enough to anyways. Oh and you should probably avoid Malazan if you are squeamish.
It doesn't always work though, if it's linux itself crashing you're out of luck.
Do you really own your game if it can be unilaterally taken away from you ? Copyright law is fucked and the software industry is happy with the status quo - no owning a license that's behind dozens of pages of TOS is not owning a game.
Nobody's giving you a perpetual license to anything, even GOG, any license you're "buying" can be revoked at any time for whatever reason they want.
I never mentioned publishers, in fact indies do not even have publishers. Can you stop with this whataboutism ?
Just like every project, you engage with it only as much as you want to. You can just use the arch install script, update pacman every couple of weeks and stop there.