I have 1989 plates on both my cars - Arizona has succumbed to the "flat plate" horror, and while I like the current design a LOT, they look like ass when flat. The '89 plates are badass. Unlike California, here you can register any old plate that's clear with DMV. I found 3 sequential plates in new condition on Ebay for cheap, 2 of which were registerable. I just had to pay the extra $25 and order vanity plates with the same lettering.. then mount these instead. Have to do that trick because you can only put older plates on a car otherwise if they're yours or a direct family member.
The YOM thing in Ca is cool. I like the old black plates, but doubt I'd put them on a newer car, since that's not natural there - the plates don't stay with the owner so you'd never normally have a black plate on a newer car. Here in AZ plates stay with the owner, as such it's not unusual to have an old plate on a newer car.
'21 M2 Competition
'08 Z4 M Coupé
'19 Golf R