I'd probably get my list down to the Taco and RL. Toyota for something I could off road with, RL for more urban warrior truck duties. I bet 95% of current full size truck owners could switch to the Honda and be more than happy with the change.
Quantitatively, possibly, but only for SOME truck owners.
I would say that
most truck owners have some sort of travel trailer, or a decent sized boat that they want to pull. The Ridgeline is just a little too undersized to comfortably pull anything larger than a small single-axle travel trailer. I would put DKaz into this category, as well as myself in the future.
But yes, on a day to day basis, the Ridgeline would suit my purposes. Except for cab space. I doubt the Ridgeline can match the amount of space we have in the Tundra (16" of rear legroom with the front seat all the way back)
But then, there are the qualitative measures. To compare to my Tundra: The height at which you tower over everything else, the deep bass note of the V8, The RWD driving dynamics, the 'feel' of a half-ton. These are all things that a Ridgeline cannot hope to match. Driving a Ridgeline would be like driving a Pilot!!!