Well, the Rivian R1T is bigger then a Ridgeline, far more rugged, and extremely capable. Have to remember the Rivian is SAE certified to tow 11k LBS, and payload is 30% higher than the HummerEV. The limiting factor on Rivian is bed space, having only a 4' 6" long bed (6" shorter than HummerEV). Rivian also goes 0-60 in 3 seconds flat per motortrend tests. Motortrend described the size as in between the current Ranger and F150, which will be perfect for a lot of people who consider the Ranger too small and the F150 huge.
For the average half ton truck user the Rivian will suit all their needs, and lets not forget Rivian is launching the SUV version just 2 months behind the truck, I think Rivian nailed it, and their suspension and powertrain are best in class (per Motortrend), interior is top notch quality (no hard plastics or cheap switchgear) I think if Rivian can ramp production smoothly they will be the #2 Ev Seller in the USA in 2022.