If they say they need X users to not cancel something, that does nothing for me, even if I trust them. I will not sign up until it already hits that point, because before then, it's practically guaranteed to be canceled. And I bet at least X users would share my opinion.

If they could just commit to maintaining Hangouts, they would go a long way to rebuilding trust. I know many school aged kids who joined Hangouts (though Google classroom IIRC) as a painless way to collaborate with classmates and friends. It's literally a gold mine for "next generation" social networking, but the fact that they are killing Hangouts means those kids are all finding their way to other feature rich platforms, like Discord.