I explicitly want a commercially-licensed driver, which is what you get with Uber Black.

Not the poster you're responding to, but in my experience the black car service is head and shoulders above uberx or normal lyft - drivers actually _know_ the cities they're driving in, there's no bs about tipping or wanting you to go to some odd pickup location that's more convenient for them, or canceling sketchily because your destination is out of their way. It's just press a button, get a reliable professional ride, no hassle, which was uber's original value proposition, but which you can't get with their standard service anymore.

Not GP but I use them for clients.

For personal use I'd be fine with a rickshaw.