Overnight ICC officials couldn't access email, documents etc, all because the U.S. government leaned on Microsoft. If they can do it to a United Nations court they can and will do it to anyone.
Spending money on a system you don't have any control over doesn't make sense. The public understand this.
I think this may have changed a bit within the last year or so...
It's no longer true. There's a huge public moment to move away from all things American since Trump and his tariff wars and putting NATO at risk. A lot of people I know are now factoring this in to their purchasing choices and there's a lot more empathy for employers changing things.