"Lines vary at field offices, but Gonzalez [DMV Spokesperson] said the average wait time is about two to three hours -- an assertion that Patterson [Assemblyman] is challenging."
"People have got two-hour wait times on top of the two- to three-hour wait times in the waiting room," he said. "The DMV is not only failing to do their responsibility, they are essentially trying to cover it up."
Even just tacking on the 75 minutes the DMV "don't have a way to track"  without scaling it up, that gets 3-3.5 hours, which isn't too far off from the 4+ hour anecdata in other comments.
 https://news.ycombinator.com/item?id=17743559 https://www.sfgate.com/bayarea/article/California-lawmaker-a...
Appointments for that location are all booked a month and a half into the future.
The unfortunate part is that this includes issuing the only widely-accepted form of ID, which has nothing to do with vehicles.
A web search for "uk photo id" brought up several competing "proof of age" cards, which I assume are privatized and accepted for alcohol, tobacco, and similarly age-restricted commerce. How are other things, such as banking, handled?
What about passports? The process here is, arguably, as byzantine and time consuming as some DMV transactions, also requiring physical presence for initial issuance, but at least the document lasts 10 years instead of 5 (CA.. other states vary).
Opening a bank account now requires showing a passport or driving license (or ID card if you are from an EU country which has one.)
The proof of age cards aren’t official ID and few people had them, probably fewer since driving licenses got photos 15 or so years ago. Can drink/smoke from 18 and most places don’t ask for ID to buy unless you look very young. Would occasionaly get asked when my birthday was when still a teenager.
That sounds similar to how it used to be possible, in California, for a notary public to confirm identity based on personal knowledge, but that hasn't been the case for a while.
That model seems ripe for abuse, although it can be significantly limited if things like vital statistics are national/centralized. In the US, they're often done at the county level, which is its own nightmare, but changing that is likely to be politically untenable (and, before computer networking, arguably, impractical for a country with 6x the population and 38x the area of the UK).