I think reports of the demise of community message boards are somewhat exaggerated. There is certainly a degree of churn, but for niche interests there are still plenty of message boards or forums available.
One of my personal interests is homebrewing and there are plenty of message boards covering this topic. As examples:
I'm only active on the UK forum, but do browse the others quite regularly. I do not use Facebook or Reddit, and do not feel like I'm missing out on anything.
Other interests of mine (sea fishing and skiing) also have quite active forums.
Of course, these are just small, niche examples, but that's the point. These destinations still exist.
One of my personal interests is homebrewing and there are plenty of message boards covering this topic. As examples:
UK focused: https://www.thehomebrewforum.co.uk
US focused: https://www.homebrewtalk.com/
Australia: https://aussiehomebrewer.com
German: https://hobbybrauer.de/forum/
I'm only active on the UK forum, but do browse the others quite regularly. I do not use Facebook or Reddit, and do not feel like I'm missing out on anything.
Other interests of mine (sea fishing and skiing) also have quite active forums.
Of course, these are just small, niche examples, but that's the point. These destinations still exist.