A student of mine did a rather good thesis on de-clouding. In the process she discovered the term "cloud repatriation" a fair bit of literature on the movement to bring control of data and hardware back 'on-prem'.
She also noted that when you search on these terms the main engines (all run by cloud service providers) return poor results not congruent with the scale of the phenomenon. They are dominated by the opposite message obviously heavily SEO'd up to the top, plus shill pieces pushing cloud services but presented as "critical". Dig deep if you want to find the real scale of the "anti-cloud" issues.
Her main conclusion was very interesting though. That the big issue is not finance, reliability or control - but de-skilling.
As companies move their operations out to the cloud it's not the disappearance of hardware from the premises but the loss of skill-sets. Later they don't even know who to hire or how to write the JD to bring people back in.
A good example was the broadcast industry. Entire branches of that industry doing post-production, colour, transcoding, and whatnot moved it all out to AWS. After price hikes, they wanted to go back to running their own services. But they can't. Because nobody knows about how to set-up and run that any longer - especially specialist things like buffers and transcoders. I mean, try finding a sys-admin who can just do simple tasks like set up and properly configure a mail server these days.
The_CUrE (./39676) :Le ton est pas terrible je trouve, mais y a plein de bonnes idées quand-même, c'est intéressant merci