Things change.
From The Well, to dial-up BBSes, AOL's nascent form of forums, Usenet, mailing lists.
Web forums changed all that, in ways good (easy access) and bad (LCD of participants dropped).
Social media has changed things. And putting aside Reddit's awfulness as a platform (including poor reliability for such a large site), it as well. Discord, too (including similar operational issues IME).
The biggest challenge is finding the users who have something to offer, and where they congregate.