Totally agree with your thoughts on Slack. I miss so much stuff because I’m in a meeting and can’t reply right away.
Slack has so much user “stickiness” because it forces you to use the app itself and eschews email notifications to keep people updated.
I’m not sure what the product looks like now, but I liked how Salesforce Chatter threaded the conversations and notified you via email of new convos and mentions. That way I can check the threads on my own time without worrying about missing anything.
Just signed up for beta access, looking forward to trying out the tool.