Cloud is the ultimate vendor lock-in. Ages ago, in the past, if someone didn't pay their mainframe support contract, they could still keep their doors open, although if anything broke, there would be Hell to pay. Don't pay the cloud bill, after a grace period, everything grinds to a halt.

It is arguably as hard to migrate away from the cloud as it is to get off mainframes. Cloud applications (Lambda, etc.) really don't translate well back, so there would have to be a major re-engineering of the backend applications to move away.

I wonder when cloud providers will wind up like Microsoft, where if a quarter is looking unprofitable, they just do a price hike across the board... with customers happily ponying up for the costs, as it is too expensive to leave the platform.