I learned to drive mechanical transmissions, and in fact my pickup truck is the first vehicle I've ever owned with an automatic transmission. I also ride motorc

I learned to drive mechanical transmissions, and in fact my pickup truck is the first vehicle I've ever owned with an automatic transmission. I also ride motorcycles. "One pedal" or "compression" braking is a given; the control you have over how strong it is is the gear you're in, which also sets available torque for acceleration (and inversely impacts efficiency, because an ICE is a big air pump). I routinely downshift the automatic transmission going downhill on twisty roads or in parking lots, and it definitely provides compression braking when your foot comes off of the accelerator, without touching the brake. I taught my adult spouse to drive and one of the ways I tempered hesitancy was to have her shift the automatic transmission to a lower gear (but not so low she'd over rev the engine driving the speed limit). I was less concerned with fuel efficiency or whether she sounded like a hot rodder than I was with providing her positive control over speed. I'd say it worked. Mostly now she only downshifts going down hill or in parking lots.