Re: Question
The only companies/organisations I know who have had to return to on-prem have done it due to data residency issues and the ensuing legal issues.
Often a large organisation will organise a load of stuff to go the cloud and then their legal departments can't renegotiate contracts and then it's ripped to shreds after years of input. I'm sure Balfour Beattie did this and it cost them a lot.