Electric SUVs are coming.
But yeah, this is what happens when gas prices fall. I drive a small car personally but the difference between 30-40 mpg for a small gas car vs 20-30 for a SUV just isn’t very significant in terms of $$ spent on gas.
It probably would have made sense to start gradually increasing the gas tax a few years ago to make fuel efficiency still worth it - on the other hand, when France increased their fuel tax they had riots.