Mine isn't a daily, but gets driven when I go to the mountains, or when I need to haul my utility trailer. It doesn't get "wheeled" per se, just terrible logging roads in the winter, sometimes in snow. I've got a 55 gallon diesel fuel dispenser and 100 gallon gas dispenser on the trailer so I tend to refuel my vehicles at home, plus have fresh generator gas on hand in the odd case of a bad storm. The truck normally gets driven at least once a month getting that fuel. Except now, since I ripped the hitch partially off the truck, which needs to be fixed.
I've done hundreds of miles at a stretch with it, mechanical reliability at this stage is pretty solid, but as all the parts are different ages, things constantly need fixed to keep it functioning enough to be useful. It will run, but when the tailgate or brakes don't work, the drivetrain working isn't enough. If I had to list out everything I've fixed even in the last 9 months, and what needs fixed, I'd probably be discouraged. All said however, even with two engines, and building it from the ground up, I have less than $15,000 into the truck over 23(?) years. One of the guys I hunt with just blew the engine in his not even ten year old F350...$25K replacement.
It's not overly saturated with uber complex computer systems, so modifications for cool stuff (injection, rear view camera, touch screen, etc) are comparatively easy to do, and with the ease of getting around the thing (don't need to jack it up to change oil, plenty of space under the dash and hood to route things and maneuver your body) it's far easier to work on than more modern vehicles. Even my dads 2008 Sierra needs jacked up to change the oil.
All my mods have generally been geared towards trying to increase longevity and reduce failures that will leave me stranded.
Anymore cost of gas/mileage weighs heavily into my decision not to drive it. My car, which is a smoother, quieter ride, with far less maintenance requirements, easily halves my fuel cost and is all around easier and more comfortable to drive. I can then dump that fuel savings into truck parts. lol
The frustration of buying ~$1000 tires that get maybe 15000 miles on them before they need replacing is also getting to the point of ridiculousness, coupled with $100+ fillups.