More seriously it would be neat if you could control how much resitence the regen brake had so that you could use it to actually come to a stop.
I think you can.
I'm pretty sure it's a two-stage thing. Light regeneration when you're barely on the brake, then more regeneration with more brake pedal, then if you push the pedal down more, the pads start doing their thing.
And I don't think the regeneration stops until you take your foot off the brake.
I'd really love to have a comparable setup on my truck and/or trailer. About 24k lbs rolling down a hill really likes to pick up momentum, wind resistance be damned. Would love to dump that energy into batteries rather than having to brake to avoid the disapproving attention of the local constables.
If I could ever retire or at least get myself to where I'm not as needed day-to-day, one of my first plans is to spend a lot of time in the workshop rigging up just such a setup and seeing what kind of fuel economy I could get out of it and a roof full of solar panels on the trailer.