Niche interest forums still exist, eg the dungeon synth forum, are there as a community, they actually probably function better for reach than twitter in a sense. Reaching who actually matters both in I twrest and expertise.

small closed communities are the future. on nostr, also. my gates, I open them only to whoever I want.

I also think hes wrong, niche audience are a big part of what makes us fulfilled as individual. The big-brother-social-media-audience cant replace the interactions with my family, my girlfriend, my little group of friend, and, in the end, the little digitals and phisical niches I organically selecte...