Imo this kind stuff probably because these “dev” having safe space on those discord servers rather than using something properly setup site/forum.
Heck you can make your own documentation using github/gitlab built in wiki or if you want something fancier, setup a site using JAMstack/static site generator, pick suitable theme then use gh page to host it.
I even more hate this stuff when the files is gated inside discord server, dude out of all possible file hosting services why the heck you would use discord?
og Counter Strike (1.6) available on native linux. It plays well even on toaster and lan play, we still have populated pub servers in South East Asia.
Another favourite of mine is og Doom 1 and Doom 2, if you want to modernize (and better mod support) the game, use gzdoom source port.