On top of what sibling comment says, Teams benefits from other network effects. If all your partners use Teams and the federation is a enabled, next time you co

On top of what sibling comment says, Teams benefits from other network effects. If all your partners use Teams and the federation is a enabled, next time you consider a replacement that can do all of this, the bar will be that much higher to find a suitable alternative. If an inter-operable protocols were enforced by some regulation it would alleviate the situation a bit.