Personally that term makes me a bit uneasy. To me it sounds too grandiose and organized just for something that might just be some random people shitposting or chatting about their interests. And actually having tight knit communities can easily lead to all kinds of negative effects, group think, hierarchies and drama.

Of course some subreddits, forums, lemmy communities etc can be actual communities but just as a personal preference I don’t like the idea of calling them that default.