Not yet, but it seems obvious to me that the GP was referring to a situation where the price changes and then you are getting gouged. That's exactly what the negative connotations of lock-in refer to.

Each provider will seek to make you take their one true path, or you need to do your own engineering.

Using the providers path isn’t necessarily gouging, but it isn’t cost optimized either. The answer depends on you.

That said, cloud is like any tenant/landlord relationship. Your rights are linked to time and are whatever your contract provides. If you didn’t like Office 2007, you didn’t buy it. If you don’t like Office 365, 2021 edition, too bad.