Keep in mind that a large fraction (majority?) of Ford trucks are work trucks. They aren't purchased because consumers have a particularly strong emotional connection to them. If they tick the right boxes and make the job easier, they get bought.
Putting a generator on it is such an obviously good idea I'm now surprised they didn't do this decades ago.
Yeah, this is going to be a major selling factor for a whole bunch of on-site service industry companies (carpenters, framers, roofers, electricians, plumbers, welders, etc).
Even a 2.5kw generator is pretty big: 2'x1.5'x1.5', weighing 80-100lbs. This takes up a significant chunk of space in the back of a pickup truck, plus requires two people to load/unload if necessary. Having power so conveniently available is pretty compelling, especially if it doesn't mean giving up 1/6 of your bed space, and only having the (I assume) significantly quieter truck engine as noise.
Putting a generator on it is such an obviously good idea I'm now surprised they didn't do this decades ago.