I don't know if I could deal with this bullshit. I work at such a small office we don't do anything but calls, faxes, and shitloads of emails. The odd side text sometimes. Adding a whole chat space thing where I'm constantly on the hook for a reply would do my head in.
We have Skype + Mattermost (without gifs) + Rainbow. Give me Teams if you want, but please, stop adding tools.
We were forcibly moved from Mattermost to Teams (because cost) and the lack of custom emotes is sorely felt throughout the company. I never counted, but I wouldn't have been at all surprised if we'd had >100 of them. So many in-jokes gone forever.
IMO Teams is better than Slack
I use Slack for personal projects and Teams for work. I think both are fine. The main reason it made sense to use Teams at work was because there were a number of products in use by different teams. IT had Slack and the rest had Zoom. Zoom was raising their costs and we already had Teams as part of 0365. So it was either buy Slack licenses for the entire company or just get everyone on Teams. It was kind of a no-brainer and it was hard to come up with a convincing argument to pay for Slack for everyone other than "Microsoft bad".