Snikket user here, too. Have used it since maybe 2024 and are very happy. The only downside is the clients even if they are very good (especially Gajim and Conversations), but also video calls.
I got so annoyed with video calls I ended up with installing Jitsi Meet. Works like a charm with no issues with video, voice, rooms, screenshare, or chat.
So whenever I want to have a voice/video call with someone these days, Jitsi Meet is the only way to go for me. If the voice call need to have an extra layer of security, my Snikket server works good.
Same here, but with Windows 10. Windows 11 is too bloated and too much of “we require you to”.