Yes, that's the primary reason why I stopped playing most new games. I value the ability to fire up games that I bought 20 years ago (and I do this regularly), and I'm not willing to invest in any that depend on external services.
Everything on GoG is DRM-free, simple .exe installers that should work without any servers.
I often run games outside of steam so I can let my bf use steam family share at the same time.
https://pcgamingwiki.com/wiki/The_Big_List_of_DRM-Free_Games...
I'm not a fan of Steam, so that's not a real alternative for me.