I had a 2004 Tacoma with a 6' bed and while that was 2' shorter than you're suggesting, it was really versatile. If I flopped down the tailgate, it was almost 8'. I could haul boards from the lumber yard that were 16' long if I planned it right (a few 12' boards underneath, and something heavy like a bag of cement on top of the boards up behind the cab, or ropes to tie it down). It was only a 4-cylinder, so my legal towing capacity was limited to 2500 pounds, but in low range 4wd I could back a 3000 pound boat/trailer up a gravel driveway without spinning the tires. Throw a cap on it and I could pack a week's worth of beer and groceries and camping equipment for 4 voracious guys .
I do miss that truck. Where it disappointed me was on the fuel economy: I would struggle to get 20 MPG, especially since most of my trips were short. In the winter I often only got 16 MPG.
Toyota pioneered the hybrid (in the Prius) and they poured a ton of money into it, but they seem to think that their Tacoma buyers have different values and don't care so much about fuel economy. It would be great if Kia or someone could tap into that same market and demonstrate how many Tacoma fans would appreciate a more fuel efficient pickup truck.
2018 Niro PHEV Gravity Blue