Spray in. Looks good, works good.
Drop ins will scratch the paint and create rust issues.
thing is, spray in, like a Rhino(??) they have to remove the paint, prep, then spray the liner. too expensive in my book(s).
previous ownership of 3 trucks dictate my future expenditures for truck beds. yes, scratched beds will form rust, but a regular maintenance of the bed, much like oil changes can be done on the cheap.
i really like my 1980 chevy stepside, and it's oak flooring. when i traded it in, back in 1986 for another new truck, this time a fleetside, is when i started the plastic liner from the dealership, can't remember what GM sold back then. but i also have a knack for installing bed rails as well. this too added to the BS of removing those, then removing the liner for a yearly cleaning.
my last truck, had a liner as well, from the Ford dealership. very nice, had cut outs for the factory ties downs in the bed. but here too, i put on a nice set bed rails, as well as the tubular steps..
if i were to never remove the liners for a yearly cleaning, i'd not care to spend the money for a drop in plastic, over a sprayed liner.
i keep (usually) all my trucks on average of 8 years.
in all this time, i absolutely never had any major rust issues, nor minor ones.
i'd much rather spend the extra money on tubular steps (over running boards), mud flaps, and bed rails. unless a new truck is a basic model, most come nowadays with some sort of factory chromed wheels, which i do not replace with outlandishly priced aftermarket ones.
yes, customizing a truck is a personal thing for sure.
but in the end, it's still a truck, a basic workhorse. no one will get more than book value at either trade-in or private sale time.
low mileage does not count, for used anything, save for maybe a class 8 truck.
it is still most times, "by the book" at resale time.
anyone spending more than book value, is a fool.
even these restored trucks we all see, in the paper, online, and on tv shows..... not really worth 10's of thousands of dollars over a brand new one, with a full factory warranty.
it'll be a cold day in hell, i ever buy a used truck, well over 30 years old, for $30,000, with faded paint, from a guy in Texas at the Gas Monkey Garage.....
but some will.......
a sucker is born every minute.....PT Barnum was right.....