If PC upgrade become as rare as First upgrades, this will not be any better for me. Back when I was PC through the Chase card they would bring me nice cars from the airport when I reserved at the neighborhood location. Not only do they not bother now that I am a lowly First (I wouldn't expect them to anyway), they decline to give me a premium on a full size reservation even when they have one sitting there.
The only upgrade I've gotten in 10 rentals so far this year was when I used an upgrade coupon. It's a bit infuriating, TBH. Why bother to have the benefit if it is never actually given? (I'm particularly annoyed today because they had an MKZ on hand, which would have been a single class upgrade, it's been sitting there unrented for days and the car I have will be up for an oil change before the end of the week so it would have made everyone's life easier to just give me the damn upgrade)