The Clarity with the strongest regen selected is nowhere as strong as the Volt, Bolt, or i3. I really liked the i3 one-pedal power delivery and control. The Clarity does require more time/distance estimation for a one-pedal operation. Compared to the i3 which had regen that was strong enough that they designed it to turn on the rear brake lights...
So that brings up a question, does the strongest regen mode on the Clarity cause brake lights to illuminate?
I've been meaning to check, with Volt Gen 2, I just used a dimly lit neighborhood road and looked in the rear view mirror. You could easily see the brake lights lighting up the reflective signs in the rear view mirrors.
I've never driven an i3, heard that regen can be very strong (and that the brake lights come on with regen). As a former driver of both gen 1 and gen 2 Volts (owned both), while not as strong, the effect is definitely there, if you don't need crazy wild driving.
I found no problem at all doing one-pedal driving in Sport regen 4 M. (that said, the Clarity, nor the Volt can perform like a Tesla) Most of the time Volt and Clarity, I feather the pedal accurately and gently by habit now. Little economy is to be had by use of choppy motions. For many, rather than natural, one-pedal driving is taxing and choppy (some say their passengers don't like it, which probably says more about technique than one-pedal driving).
I find I am moving towards Clarity normal mode now, playing with the regen paddles more. As I recall, Volt only coasts in "D" and has no regen by go pedal, and relies on use of the blended braking for regen driving. By contrast, I think we (Clarity PHEV) always have level 1 regen in D (very light), which can than be temporarily increased to levels 2-4 as desired by use of the regen paddles (and manually set and held in Sport, except for in ACC, yet anther topic).
Also, ironically, there was a strong trend in the Volt community of recent years going
back from one-pedal driving in L to D as to economy and efficiency. So, getting used to driving in Clarity normal or eco with a regen level of 1 may well be a nice middle ground (compared to coasting).
The point of the original post was so that Volt drivers could easily try a "similar" technique in the Clarity by use of Sport 4 "M".
Honda has done a suberb job in implementing blended braking (you can watch it working in real-time on the driver power curve display) to blend electromagnetic regen braking finally into friction braking. The Clarity can be very competently driven by accelerator and brake pedals alone.