Thanks for the replies. It sounds as if B mode might be okay on the ID.4; AIUI regen is also blended in on the pedal. Have to drive it to be sure.
I did like the Bolt's setup, giving effectively four different regen levels. While cruising on the flat, uphill or on straight not too steep descents I used 'D', using the paddle as needed. Steeper, twisting descents and around town I'd use 'B', with occasional paddle as well - descending the east side of Sonora Pass the max. slope is 26%, including on some tight 135-150 degree curves.
I also liked the Niro's 4 levels, all on the paddle, but unlike the Bolt I didn't get to try it on really steep roads or for very long. I'm hoping there'll be a lot more options I can try on Turo this year than last, as there are a bunch of PEV CUV models coming out.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].
The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.