Hangouts was a GSuite (enterprise) service. Customers were forced to move Chat & Meet when they shut down Hangouts.
https://gsuiteupdates.googleblog.com/2019/01/upcoming-hangou...
https://gsuiteupdates.googleblog.com/2019/01/upcoming-hangou...
I’d say the biggest situation that materially affected companies was the Google Maps pricing change, but most seem to be fine with that now.