I'm guessing the broader demographic of users simply don't think the software is crap. My buddy working in water transportation was just raving about Teams to me the other day. His praise basically boiled down to being integrated with his organization, providing him easy access to his department-resources. I suppose it does serve my buddy well.
Could be because I use a Mac, and I do most of my work chatting in Slack, but I don't hate Teams. It has my calendar, it has chat that is shitty but good enough during meetings (although finding which room you have unread messages in can be confusing), and it has video meetings with transcripts and great Exchange integration.
