Nice of you to point out what us in Ops have known all along. I'm afraid it will fall on deaf ears, though. Until the executives who constantly fall for the new shiny are made to actually examine business needs and processes and make business decisions based on said.
Our laughable move to cloud here involved migrating off of on prem Exchange to O365. The idea was to free up our operations team to allow us to do more in house projects. Funny thing is, it takes more management of the service than we ever did on premises. True, we aren't maintaining the Exchange infra, but now we have SQL servers, DCs, ADFS, etc, to maintain in the MS cloud to allow authentication just to use the product. And because mail and messaging is business critical, we have to have geographically disparate instances of both. And the cost isn't pretty. Yay cloud.