the "tft community" is a nebulous (like thought itself) thing centred mostly around twitter as a space, and around (again, mostly) note-taking tools as a subject. I'm not part of it.
This HN article is a nice summary. If you want a deep hyperdive into their "ways of thinking and linking" (IA is actually not that far), you can follow some rabbit holes on are.ena like this one https://www.are.na/krish/tools-for-thought-lnujvshtshi