I have found this aggravating for some time as well. I really don't give a sugar about plug-in hybrid sales because they will be going away soon enough. The fact that they need regular oil changes means they should be lumped in with ICE sales!
Do you have a sense of the origin of this tendency to lump PHEV's with BEV's?
I strongly disagree. PHEVs are very similar in that psychologically they require adaptation.
From a psychological standpoint they are closer to BEVs than Fuel Cell cars.
Besides, I know of many people that refer to PHEVs as their gateway drug to BEVs