What's bad in leaving troll and scam infested slack? It's the worst social app of all current popular ones anyway. Maybe they should go to discord also, besides telegram.
Maybe Discord can be appropriate replacement, but telegram is just not good enough.
Yes slack become sick place but it is still essential for all projects. I would like this place to be more active, this is moderated thread why they do not work on this? Few posts weekly can restore faith in this project. At least they can inform us about latest news.