We also need people sharing their niche interests and creating discussion… Reddit thrives on these small communities that only find an accessible entrypoint on their platform.

If you say it like that you are pretty much trying to aggravate them, though

Lemmy is missing so much stuff, it’s pretty tough to be only here if you want any content except (left wing) politics and tech stuff

Forgot about BGG! That one is amazing, too

I just stumble upon them using Kagi search and phind.com

Forums are still alive in ultra niche communities. My favorites: Badger and Blade for wet shaving, Snuffhouse for snuff tobacco, Quantnet for quantitative finance. All of these gather way better content and users than their Reddit counterpart, which usually devolves into memes and pic of the day stuff