When I first started riding an "endorsement" wasn't needed. A regular license was good enough.
Several years later, they added "permits" to the requirement, but those were essentially licenses and you had full riding privileges. They had to be renewed every 2 years, I think, and since an appointment to take a skills test for an endorsement was always inconvenient, I'd just renew the permit. And eventually, feeling rebellous, I just rode with an expired permit anyway. I never got pulled over....
Then I rode dirt for about 10 years. Then "marital difficulties" caused me to sell all my bikes
and I was bikeless for a few years
Then I remarried and got my newbie spouse into riding and we got 2 bikes
but she needed training so we did everything legally
with permits and eventually the MSF course
and then finally after 30+ years I was riding with a little "M" stuck on my license and I was so proud of myself 8)
I still haven't had the "opportunity" so show my license to a cop yet, though.