Not to sound too much like a contrarian, but with an automatic, aren’t lower gears really more of a benefit for low speed crawling, if needed at all? I have a 3rd gen Tacoma automatic, and I just manually shift to 5th or 4th or 3rd if needed on highway grades. Yeah, I shouldn’t need to, but I do appreciate the tall gears and low rpm, and resultant mpg benefits on long downgrades. Ratios are close enough that I can pick the power and rpm balance I like. The torque converter helps a bit too.
Now if I had a manual transmission, and had to slip the clutch a lot at low speeds, I’d appreciate lower gearing, especially with what I’ve heard about the MT Taco’s reverse gearing. But there’s always low range. Note that my experience is with stock or slightly larger tires, I understand that with taller (and much heavier) tires a gearing change may be needed.