Agreed. Forums are tricky because in my experience of you get too many people outside of the niche you're discussing the quality goes down.
But if you don't have enough then the Reddit community will take the majority of the discussion away from the forum.
There are some good hobby based ones still out there but discovery is always a challenge. Your best bet is finding someone who's engaged in discussions you like and seeing where they go for said discussions.
It needs a more diverse set of topics other than just crypto. I mainly just check it to see what's up cause I like the protocol.
I use it the least but occasionally post so it gets some more content on there that isn't just crypto. I generally only post on decentralized social media to be the change I want to see hence why Nostr is included.