Perhaps this is a difference of definition, but when I think of "basic car" I understand that to mean the minimum vehicle that can legally operate on the road. Brakes, steering, lights, mirrors, airbags, etc. Backup cameras, AEB, and emissions controls, are all part of that now for better or worse.
As far as NHTSA is concerned, backup cameras are just as mandatory as working brakes. You can't build a vehicle that doesn't have them, and most (all?) states prohibit operating vehicles without these features. Tesla, Mercedes, Nissan, Toyota, Honda, and Subaru have all had safety recalls because of issues with software failing to display that image properly.
Older vehicles don't comply with these newer regulations and are only allowed to operate because of grandfather clauses.