I work in IT. I think it's popular because it's "free".
With that said, I put up a picture on the office wall of a Swiss army knife with features like syringe, fire extinguisher, axe, etc and have it labeled Microsoft Teams. Yes, it can do 100 different tasks, fucking poorly.

you're right. screw Firefox. let's all go to chrome. wait, no, edge, wait no, that one browser half the sites don't work on.