I have been a linux user since about 2006. I didn't really even know anything about the MS stack when I started at LargeCorp a few years ago. I was actually pleasantly surprised how well most things just worked. Teams was a bit shakey at the start, but the office online integraiton was nice, we were able to collaborate, exchange worked out of the box nicely, the phones in the office were even tied into whatever system we had so I could have my number even if i was sitting at a different desk for a week.

I understood why when teams came out they said "okay stop using slack because we now get teams for free". They already have MS every-other-product and now they got another one at no extra cost.