Many are also not tech-savvy. Many dealerships are inherited within a family that has owned them since the 1950s if not longer. They are cash cows for the owners and there's little motivation to try new things. When they are forced to, like when internet sales and marketing became a thing they had to deal with, they just go with the same system that all their fellow dealers are using.
There also isn't space to grow. It's not like running a dealership with hyper efficiency is going to lead to being able to open another dealership. The market is largely saturated and in the rare event that an existing dealership comes for sale, you'll be competing with massive PE-backed conglomerates that can pay nonsense prices for them.
