It doesn't change much. Most of the stuff we need for porting the OS is from stuff they mostly developed in the internal branch they plan to move the remaining components to, so the main branch was largely unhelpful regardless. Too little is published ahead of time.

Some stuff was developed in the open so we could backport some fixes early, but now we won't be able to although that wasn't a common thing we did often.

If we had partner access through an OEM, this wouldn't matter -- but we don't.