This is the reason I use it too.
I first installed it when the Teams web client stopped working properly in Firefox. I installed Edge, and it worked well. Also noticed Teams in Edge allows me to turn on background blur, where that was disabled on Firefox and Chrome in Linux. Then I tried PWAs, and found the Edge support for installing and running PWAs is second to none, so now I run Outlook 365 and Teams as PWAs.
Firefox is still my primary browser, but I don't use Chrome anymore. Edge has become my chromium-based browser of choice. Somehow Microsoft has built a better Chrome than Google does.