Oh no worries, i am technical and autistic enough to setup systems that will serve my actual needs, regardless of economic/industry expectations.
Lutrius is great but i prefer Heroic game launcher, it can do the same but does also provides convenient acces to gog, epic and amazon licenses. I am only storing backup copies of games if i actually find it worth it to keep them, and i acquired a lot of mediocre titles over the years.
I also do still do use steam with little hate towards it there own implementation of proton is hard to beat in its reliance. I have yet to find a single game within my steam library that fails to work properly on arch.
Doesn’t stop me from working on my own alternative local game server parallel to it, Mhehehehe
Regardless i still feel like i should just be able to legally download some standalone offline installer from a website for later use. Especially for older games that used to have physical copies. whether or not my system can run that installer as it is, is morally irrelevant.
Ive had similar ideas on verified unaltered media to combat fake news. Such an archive but for journalism would be a great start.