Any of the companies I've worked with (and I've worked with many) are large enough and have been around long enough to understand that re-architecting apps, doing lift-and-shifts, re-training employees, or anything like that is an inevitable cost of doing business that is going to happen every couple of years no matter what, so any time fretting about "lock in" would ultimately be a waste of time.

And perhaps more importantly to these companies, lock-in is more than worth it if it means benefiting from some real revenue or cost optimizations. Paying $3 to "unlock" from a platform is more than worth it if said platform gave me $5 of benefit.