Sure, with the appropriate baking time. But I don't see a cloud company taking an intermediate version of this patchset, backporting it themselves and then sending it out to all their customers in a hurry.

Yep. The kernel maintainers are being so aggressive with this that I'll be very concerned if there isn't a major security issue coming down the pipe. I know that Linux is considered fast and loose in various circles of old-school hackers, and granted, but merging this type of fundamental change into stable is not normal. There's something brewing here that is pushing this to completion.