So, by that logic, you could run 87, and you could also run smaller tires. Smaller tires would save way more money than low octane fuel.
Its not a money thing, its a "why buy a performance vehicle if you dont care about performance" thing. It just doesnt make sense to me.
Its similar to buying a hellcat and never using the red key. Whats the point? Just get a charger.
No matter the fuel being burned, the "performance vehicle" is always going to be much faster than the base model. On top of that, acceleration is far from the only thing that makes a performance vehicle a performance vehicle. It's the most celebrated aspect, but the suspension, brakes, wheels/tires, exterior and interior upgrades that are typically present over base versions are just as nice to have and always there no matter the fuel being burned. Giving up a slight bit of ultimate acceleration to save money on the fuel costs doesn't mean someone doesn't care about the performance in their vehicle.
As for the Hellcat- acceleration is the ONLY attraction. Of course you would use it all on a regular basis. Otherwise it's an overweight pig on an ancient platform that makes you feel like you are sitting in a bathtub while driving it. It doesn't corner very well and the brakes are nothing to write home about due to it's weight. The Raptor though? It's a low 14 second pickup truck at best, even on 93 octane in mineshaft air. Maybe mid 13s tuned, if you are lucky. Yeah, it's damn good for a truck with 35-in tires, but mid 13s is no faster than a 10 year old Mustang GT you can buy for $10K. It's still slow as hell no matter what you do to it, and of course the brakes suck ass due to the weight and the massive tires.
I was saying it somewhat in jest, buy seriously, why don't you put some big ass turbos and aggressive tune on your truck and burn 104 unleaded everywhere you go? If ultimate acceleration is the target for you, and fuel costs be damned- well, then you still aren't doing it right. There's something called "balance" in life and we all choose our own point at which the scale tips.