Our 2006 has the slide rollers that touch the floor. One was bent from catching and bending on the original carpet. I bent it back and its been fine. They dont contact the floor for the entire distance when 'sliding' the slide' so if you extend the slide fully, under-slide floor work is easy. The wheels also come off the slide pretty easily (when slide is extended) before installing plank floor. I had to fix one anyway, so i took the rollers off for flooring work.
On our 2006, the flooring was not a barrier to the wood subfloor. Where there was carpet, there was a little overlap with the linoleum. The carpet was over bare wood. Carpet came out,I left the original linoleum in, and it has no 'bump'.
Dunno about cheaper alternatives, but Lifeproof has been..well...lifeproof in our rig so far.
NO scratches or damage from the dirty , loaded cooler in there LEAKING slowly for several days before discovery...
I have had photo gear thrown in by helpful people during rain events. Not a scratch.
Both slide rollers contact the floor, no marks yet.
I found one post about a RV with SHEET laminate flooring splitting in cold, but all the posts about lifeproof flooring in unheated cottages up north seem to have happy results... If anyone has the link to the plank style flooring failing in an RV I would like to see!

If I find myself and the camper in sub zero temperatures... I will have done something VERY wrong!

Done with those days.