Speed limiters should be an on all vehicles, especially commercial ones. Speed limiters are virtuous technology; they remove a source of dont-ask-dont-tell coercion for delivery drivers to beat a schedule. Slow(er) moving trucks and cars also make neighborhoods safer. It's win-win.
It also puts the screws on management who want to squeeze faster delivery times out of drivers but don't want to know where that time is coming from.
"Oh no, of course I don't want you to speed! But I'm SURE you can come up with a way to do this route in 50 minutes instead of 60! If not, I bet we can find someone that can."