GOG has DRM for many titles: see Galaxy. As I understand it, it isn’t as pervasive as Steam, but is necessary if you want multiplayer on many titles or care about extras like achievements.

I have been utilizing BunkerWeb for some of my selfhost sites since it was bunkerized-nginx. It is indeed powerful and flexible, allowing multi-site proxying, hosting while allowing semi-flexible per-site security tweaks (some security options are forcibly global still, a limitation).

I use it on podman myself, and while it is generally great for having OWasp CRS, general traffic filtering targets and more built on top of nginx in a Docker container, the way Bunkerweb needs to be run hasn’t really remained stable between versions. Throughout several version upgrades, there have been be severe breaking changes that will require reading the setup documentation again to get the new version functional.

I am not sure if jest, but you could always take a few seconds at protondb to see that yes, all of those games do in fact run on Linux. Forza in particular seems to have issues for some users, but everything else works with minimal hassle.

The desired alternative is not Matrix simply because privacy-conscious, open-source ecosystem vs. proprietary solution is not the goal. Matrix would still generally be terrible for support. What people want is publicly searchable content that is ideally indexed like a wiki. Many will happily settle for issue boards or even forums though. Discord has pathetic search capabilities in comparison to any search engine and has no way to properly and publicly backup information that is posted to the platform. With a website of any kind, one could clone the site for mirroring or simply get a web archive service to crawl relevant sections.

VideoLabs is made up of many of the same contributors of VideoLAN, including Jean-Baptiste Kempf themself. It is arguable that this is in fact Unity banning VideoLAN’s VLC bridges for media playback in Unity.