[jonahx]

> In that case wouldn’t it make sense to try to get your friends to use another group chat?

This greatly underestimates the power of habit and default choice.

I can tell you for sure that if I tried to mount such campaign among my (non-techie) friends, there would be a lot of pushback and annoyance.

[baddox]

But this doesn't seem at all relevant to market competition and antitrust laws. It's not much different than disagreements over which coffee shop your friends are going to meet at (maybe you're the only one that lives really far away from the group's most convenient location), or who gets invited to a group of friends' parties.