I think I have been a part of over 100 telegram groups in the past 1.5 years. I am currently in over 10 discord groups. I HAD 15 slack groups. I have been to two meetups.
What each of them had in common were that they were young communities trying to grow and build. None of them come even close to Nuls with the way people help each other and noobs on telegram to the building and developing of things that even I can use.
I am impressed and I can't wait to see what happens next.