Well, what's the purpose of asking members from bitcointalk to third party apps like slack and telegram is something I cannot figure out. Have seen a lot of ICO asking to join their channel, but what prevents them from corresponding with participants in this forum itself, which would have been more transparent?
Different channels have different purposes. The forum is good, but to be honest it is quite old school. People outside bitcointalk will not join it for an ICO.
Sure sign crypto wants to expand above it's current reach.
There is a lot of Twitter activity surrounding crypto - just that medium is strange. Limited single purpose, unsuited for any dialogues more along a constant stream of announcements. Google Wave survived, now maintained by the Apache Software Foundation. Porting the old forum data onto something new could prove to be next to impossible. Wave would be pretty much up to date.