> Slack also is great when the conversation is heavily one sided.
Honestly, that seems extremely unfair to me. It feels like you're using it wrong. In my experience, Slack is for conversations. The groups I'm in use it for tossing out random thoughts/questions... and people participate as they choose.
If you're using in a way where people are constantly pinging you demanding your attention, then you should change that. That's no different than being in a large office and everyone else feeling free to just walk over to you and tap you on the shoulder every time they want something. If _that_ was happening, it would be something you should fix, too.