There are alleged cost savings elsewhere. I haven't seen a company that's actually realised them. Every company I know of that's gone all-in on cloud is paying a fortune and still has a big team to manage everything.
My company alone has over 150 case studies that document specific positive ROI on cloud adoption. Not every can or will run their own; I’m pumped for Oxide and I think they are going to smash, but some teams really really benefit from Public Cloud.