I'm still expecting a relatively slow death for Reddit, perhaps even not a total one like with Digg's quick and complete collapse. I'll be sticking around Reddit past the June 30 horizon, I'll just be doing it entirely via my desktop browser. I'll probably only stop going once they get rid of Old Reddit.
This means that there'll be a gradual winding down of the communities I pay attention to, accompanied by a gradual migration to places like here. Hopefully little will be lost in the process.