- theres no way everyone can follow everything going on in multiple channels. This makes it almost bs. Theres way too much noise and is overwhelming
- Theres too much lost information in channels and conversation threads etc. At least in email things are somewhat more permanent. As the channels go and more and more people are typing, so much context is lost, and unless you're following the thread you don't know whats going on and people just skip it most of the time.
- On top of that slack threads are lost forever in time unless pinned. The conversation rarely gets translated in to wiki or email or whatever so decisions are sometimes made and forgotten.
Overall I think these are solvable problems but requires a very opinionated way to work or creative solution ( a la google wave, yes it was an awesome tool ).