Nah, it was relatively common on base models that did not have a head unit with a screen, and that definitely includes Hondas and Toyotas, for example. The most common type of vehicle to use such a setup were pickups. For Toyota, the Taco and Tundra are the only vehicles I can think of which used an in-mirror screen. Honda did it in the base model CR-Z. Ford, Chevy, and RAM did it on their trucks.

my 2011 F150 has a rear view mirror backup display, and it's quite nice.

It's there when the truck is in reverse and otherwise just a normal mirror.

Early 2010s actually seems like a sweet spot for a lot of automotive tech - it's decent enough, but "mobile" wasn't really a thing yet, and bandwidth was expensive, so there's no assumption that everything should be an app phoning home yet (iPhone was still brand new).