I find organisations and individuals use Microsoft because they use Microsoft.
They freaking love anything that comes out of Redmond.
No matter how convoluted and unexplainable they just love it.
I started a new job Monday and they have Teams and Sharepoint and everything else MS.
my office386 password is HaTeOrifac3.
I used to use Office many years ago, now have to use it again.
Initially looking at Teams is good, actually using it is painful and time consuming.