They mostly didn’t have OSDs, they instead had indecipherable 7-segment and some fixed elements like ‘Su Mo Tu We Th Fr Sa’, with 2 or 3 buttons. The younger Gen-X/older Millennials got their reputation as ‘whiz kids’ in part by handling those interfaces on behalf of their mystified parents.
I find it insane that with modern computing and displays, they still just render a vague check engine light despite being able to easily display the specifics.