Just to try a slightly more useful reply, you may be talking about the level of regen you will programme the vehicle to have.
When I was buying the Blade car, I was initially told I could have any regen amount I wanted, which simply meant that it was adjustable.
I was immediately told after that there was a general limit that they would set it to for usability purposes (my words).
I always liked the idea of massive regen (without regard to technicalities) to be able to scream to a halt and get all that energy back
So I'd imagine you would set regen to slightly more (for the above reasons) but only use that as a starting point and run you car around a sand covered concrete curve with plenty of runoff on private property etc etc, taking great care, and vary it, if this is where you are coming from.
Acquired thoughts on regen are. Yes, you're getting energy back into your system (much more useful on long trips where you may be relying on it to maximise range) but you don't get a huge amount back (I know every little bit helps, and I know you're not using mechanical items that need maintenance, like brakes).
If you have rear wheel drive, then the rear tyres take the brunt of acceleration as well as braking via regen, and have accelerated wear.
If you have front wheel drive, then the front tyres face acceleration, regen and turning wear.
I'm starting to see regen as great for reducing the need for mechanical brake maintenance, more than anything else.
I drive the ev mostly gently. I try to use no more than half power gauge reading except when I get annoyed with something and 'flatten' it to move to a better location on the road (around town). Towards the lights, I regen-brake quite early if there are no vehicles behind me, and fairly early otherwise. I take my foot off the throtle to the extent that regen is building and only that far (you ev people know that feeling that regen builds as you let the foot off the throttle but at some point it doesn't build any more). In the other lane, I see the idiots doing what I do in an ice car, accelerate at the normal rate of the particular car, hurtle towards the already going to red lights and then stop the car within its usual ability. In good words, all over the top.
They're destroying their tyres and their brakes, and chewing fuel. It's all good, just all too much. Also nothing worse than the dills who drive like it sounds like I do, slowly move away, get to 10k's under the speed limit, stay at that speed no matter what, and give the impression they aren't quite sure what they're going to do next. But I don't do that, I just do everything more gradually, not more slowly, because I stay aware of my surroundings (bike rider, see) and behave the same as everyone else if I happen to be stuck in that traffic location.
Maybe this has been more useful (spelt 'tedious'