Some gas engines have low end torque, big block V8s and anything turbo. But yeah if hauling uphill is your thing diesel is a no brainer. It would be great if our half ton and midsize trucks had diesel options but as usual other countries have better options.
Personally I'm going hybrid truck next time. The advantages of electric (torque, 240V inverter) with the flexibility of gas. Payload is lower but I'm hoping they fix that by the time I need a new truck