There are retrocommunity sites. DOS, OS/2 (eComStation, ArcaOS), Amiga (Apollo Vampire), Mavericks Forever. Amiga is quite alive community. If I am to write game, I consider this platform. Steam game will be lost in 100.000 games, and Amiga game will be noticed.

There is I2P. They have been disabling scripts for ideological reasons, so there were many websites without scripts. I have used quite exotic Charon web browser from Inferno OS in I2P. That was 15 years ago. Don't know how it's now.

There is RetroNAS and plenty of other software to enrich home network.