Sadly 2 seater vehicles won't ever happen en mass. There's a lot of people with families who will need at least 3 seats.
Two seat pickup trucks are mostly sold to delivery customers. 50 years ago they were more common when you put the kids in the bed, now that isn't considered safe (for good reason) and so those customers buy the extended cab for the family. Sport cars and Compact cars exist, they are a small niche (and often sold to people who have a larger car for "the wife" to drive alone to work)