Slack is extremely hostile towards user feedback. I sent them comments on what I believe to be a terrible feature and they also told me it will never be changed.
And they are far from the first consumer-facing company to deal with user backlash when a new feature came out. Facebook notoriously got an onslaught of negative opinions and sometimes press when a feature in the UI changed. The UI never caused any significant migration away from Facebook, only the privacy/surveillance concerns, vitriol, and the "embarrassed by my parents" un-cooling of the platform caused users to leave.
From what I read here and elsewhere about feedback from customer service, I suspect there is a push from management down to product to hit certain targets (I don't have visibility into Slack's internal metrics, but this is exactly how it presented in my previous company).
This is what hostility looks like. They think they know better than their users. They don’t.
When others try to emulate him, it doesn't go as well.
We'll never actually know unless someone finds a way to raise the dead, but I personally believe that Jobs would never have allowed those butterfly keyboards out the door.