At google we did pretty much the same thing. Aimed to be able roll a kernel in 30 days, but various edge cases always made it drag out at the end unless you re

At google we did pretty much the same thing. Aimed to be able roll a kernel in 30 days, but various edge cases always made it drag out at the end unless you really spend a lot of human time on it. So use kaplice for really critical stuff (where the patch was easy, not always the case). A reasonable compromise in the real world.