Having experienced both the DVLA and (California) DMV, the DVLA feels miles ahead, like it's living in the future.
Things like finding out the status of a renewal involved finding a fax machine, everything but the most trivial renewal (say, renewing if you're on a work visa) seems to be done in person with handwritten paperwork, and the amount of busywork that seems to be done by hand by the DMV agent is quite easy to blame for the impressive wait times, multiple hours even if you have an appointment.
My DVLA renewal was trivial comparatively, they could even use my passport for an updated ID photo. But maybe if you're not a UK citizen they also make you jump through weird hoops?
I'm not saying that the DVLA is good, just that it could be even worse.