I would think reg cabs would really bolster fleet sales.
Depends I guess.
I would thing the only bonus of a single can for a fleet would be if it cost less. Other then that I doubt most companies would care either way.
Rental companies would want a crew cab no matter what.
Most other companies or government if imagine wouldn’t care or prefer super cab/ crew cab. Going to be using it as a runner instead of a full on work truck so bed size doesn’t really matter.