This. Power users (normally engineers) drove Slack usage at my last company. I'm now in an org that uses Teams and all the engineers want to use Slack. Likely won't happen but it's important to note that this feature isn't just annoying a small segment of users, it's annoying the small segment that are most vocal about adopting Slack. And who due to economic power arguably have more influence.

It's not just that the eng/dev/power users (me) prefer the old behavior, it's that we're the only ones I see who use it.

I get little pangs of dread a split second before I realize I'm about to have to spend 10-30 seconds figuring out new formatting since it shipped.

And as a response, I'm less reluctant to use it, meaning my messages are less detailed, meaning longer conversation, less precision.

It's a "convenience" for non-power users, on a feature only used by powerusers