Lots of spray in fans here, myself included.
With that said, I've had drop ins and just don't like they why they feel when walking around in the bed.
I had a Tundra for many years with a no name spray in. It was too thick, caused the tailgate to not shut too hard and I had to replace the bushing in the tailgate twice.
I've had two with Line X, and like other recommend it. Don't be fooled though it can be damaged. My last truck was a 2019 F250 and it had a couple of dents and scuffs that went through the liner. I did not bother getting it fixed before I sold it. I then put a bed mat in the floor and I really liked how it felt over the line X
With that all said I have a 2022 F250 on order with the Ford spray in, since I'm putting a topper on it, I'm going to try a bed rug over the spray in. If I wasn't doing a topper, I would throw the bed mat in over the spray in as well.
I think a lot has to do with your application. Knowing what I know now, I would have something in the box to protect it. That something would not be a drop in.