Comment by jacobgold

The fundamental problem with replacing Slack is network effects. Your coworkers and customers already use Slack. It works well enough.

You can choose to switch your company away, maybe, but what do you do when vendors want to connect over Slack?

Imagine if email was owned by a company?

Edit:

W̶e̶ ̶r̶e̶a̶l̶l̶y̶ ̶n̶e̶e̶d̶ ̶a̶n̶ ̶o̶p̶e̶n̶ ̶p̶r̶o̶t̶o̶c̶o̶l̶ ̶t̶o̶ ̶b̶u̶i̶l̶d̶ ̶o̶n̶.̶

We really need an open protocol to win here.