I don't get the allure of one pedal driving. I have a Model Y, so I use it, but I'm just kind of "meh" about it. I think they introduced it related to re-gen, but these days it's kind of an arbitrary UX choice - on the Tesla you can enable brake assist to mimic the one-pedal driving experience when it's cold or you have a 100% battery, and other cars (maybe Tesla?) will periodically use brakes instead of regen to dry them off or otherwise exercise them a bit.
So then, if it's not actually a "fly-by-wire" mechanical system, why would you choose that as the UX? It cramps my calf constantly keeping it partially activated and the pedal half way depressed. More often than not I'll relieve my foot by doing short stints of cruise control, but that's tedious to manage.
My dream set up would be the accelerator pedal is, well, an accelerator, and the brake is a decelerator, and if you're not pressing either the car maintains the current velocity. It feels like _most_ of the time that you're driving you're just trying to make it go the same speed, and then you can press whichever pedal you need if you're wanting to stop or start again.
I don't suppose any cars work like this? ICE vehicles more or less in the moment do but "coasting" does decelerate a small amount so that over time you have to push the pedal again.
> and if you're not pressing either the car maintains the current velocity
That'd be horrible. A medical emergency of one would potentially turn into a medical emergency of many.
With a Tesla you can use cruise control without autosteer also on smaller roads, and it should also slow down for turns (since ~1.5y or so IIRC). Normally it's good enough that I don't mind.
We've got one-pedal on the Ioniq. I've tried it, meh, I don't see the appeal. It's not horrible, but I'll probably never use it again for many of the same reasons you list.
My dream set up would be the accelerator pedal is, well, an accelerator, and the brake is a decelerator, and if you're not pressing either the car maintains the current velocity.
Sounds like cruise control, which many cars have.