I cannot imagine that any medium company would invest the time and money necessary to quit slack. Especially when you have bots everywhere.
It’s not that it’s undoable but you have to replace it with something reeeeaaaally awesome to justify the pain.
Today Slack is pretty meh, there may be better alternatives considering your use case but nothing so awesome that you would do it.
In my experience Teams is winning, but not because anyone wants to use it.
> cannot imagine that any medium company would invest the time and money necessary to quit slack.
You would be surprised at the "cost savings" companies will do to make their most expensive assets waste time.