Pickup trucks are more visually appealing without IMHO.
But, they are just too handy not to have.
Cab height and color matched is a good compromise, but you can't beat a raised rear for utility.
Driving visibility is better with them off and the truck just seems lighter and easier to maneuver.
But, first time it rains and I need to throw something in the bed or the dogs have been running through a swamp or at the beach makes a truck cap worth it's weight in gold. Moving across country the cap was an essential piece of kit.
If you haul around a lot of loose stuff on occasion (or regularly) a cap is a godsend for loading and ripping down the highway. Throw your loose/light stuff in the bed, close the back and rip down the highway at whatever speed you want. No bits flying out, no crazy tiedown schemes to keep all kinds of stuff in the bed.
Things are also lockable under a cap, but it's all relative with locking things in a vehicle. Anything with glass windows is only ever so locked.
Depending on
how you "camp", it can become your home away from home in a pinch. I'll take sleeping in the bed of the truck under a cap in a surprise summer rain storm over a tent any day. Warm, dry and secure....
Here's mine:
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Big, white and somewhat "fugly". But I also only paid 50 bucks for it.
The raised rear is great, I don't have to crunch over like a monkey ******* a football every time I have to climb in there. I highly recommend one if you plan to actually use your truck. I can even get a quad into my bed and move around with the raised rear.
Here's a similar setup but color matched:
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I fought it for many years, but I can't live without it anymore......there's just waaaay to much utility having it on there to not have one.
And I can always take it off with 4 clamps when I need to pick up a load of gravel, topsoil or mulch.
1BadGMC is right; only you have to like it. Fug everyone else.....