Not at all, Project Treble makes it so, assuming that OEMs upstream their drivers, but as usually happens in the whole fragmentation story Google is only advising OEMs to do it, not enforcing it.
People need to realize Project Treble will only improve Android, if Google has the guts to force OEMs to play ball, until then having a certified Treble device doesn't mean updates will be made available.
People need to realize Project Treble will only improve Android, if Google has the guts to force OEMs to play ball, until then having a certified Treble device doesn't mean updates will be made available.