ParanoidNemo I think now GOS has the tooling and experience to deal with what happened between A15 and A16, we should be good, honestly it was about a month in terms of delays which isn't that bad.
Some OEMs are months behind and have much larger support teams and access to the device trees.
I honestly wouldn't worry, it was a little worrying at the start, but I think we are past the worst of it, it may happen with A17, but who knows, the big test will be when the pixel 10s come.