My $0.02 is stock truck with sliders and decent tires results in a formidable vehicle. It's not that sliders are necessary but just having the rocker protection and that little bit of ability to touch without worrying goes a really long way in confidence. Plus having solid steps to get stuff on the roof, like bikes, is huge.
Otherwise that stuff we add is for convenience and meeting a need. Suspension is often needed to prevent sagging, which is a byproduct of growing soft as we age with a fridges and lots of junk. The important thing is to use your truck and go with other people, you'll see pretty quick what you need and what works.
