'Community' is 🔥🔥 these days. Is it a fad or a new wave??

I'm the founder of Pensil (https://pensil.in) - we are building a simple community-building platform. Still in the early days but getting good response from people who have tried our product. There are several use cases for community platforms - cohort-based learning, product feedback, interest clubs etc. We are now trying to build customer personas to streamline our content and marketing piece (right now it is all over the place). Do you think communities are here to stay? If yes, I'd love to know about your experience either running a community or being part of one. What problems did you face? Also, what community platform do you like the most? Is Slack or Discord sufficient?