> I don't know why we don't switch to Teams.

If you'd used Teams, you'd know why. It is hilariously bad, gratuitously slow, ludicrously weird. I have periodically had to use Microsoft's team chat tools over the years, dating back to Yammer or perhaps even further, and for whatever reason it seems they just do not get chat.

Better question: why not just switch to Mattermost?

> If you'd used Teams, you'd know why. It is hilariously bad, gratuitously slow, ludicrously weird.

I use both all day, every day. I don't find Teams to be any worse, slower, or weirder than Slack.

Teams also does a lot that Slack can't do. As one small examples, it seems amazing that I can't add tabs to a Slack channel like I can in Teams.

I have to use both heavily at work right now, one part of the company is on Slack, another on Teams, I'm involved with both. Despite its (many) issues, Slack is just so, so much nicer than Teams, the difference has an actual, substantial impact on communication. Teams feels like a disconnected and disorientating mess of ideas copied from other communication solutions in a huge hurry without understanding them fully and without even getting them to a point where they "click" and work as intended, and without thinking about how they fit into the big picture. Sole exception: Video calls are much better, when they work. The rest is a mess and makes communication a much more tedious effort than it has to be.

> We might have to re-do some bots,

You might not even be able to, Teams API is quite badly convoluted and limited. You simply won't be able to f.e. recreate Slackbot experience in group conversations(chats).