This is really a sad news. I am still using it for work every single day (in fact hour).
Teams does not include what I need, and I am currently exploring alternatives. For now, the best candidate I have found is Zulip, a Slack-like / Mattermost-like application that seems to have a good messaging system included (but no built-in methods for video calls, unfortunately). I still have 2 months to explore options... We will see.
Cheers!