We ran our 1st 27'RK with a super slide for 65k-70k miles and nothing broke.
The 32' RK with two slides in sig has around 125k-130k miles and nothing broke inside even after a very rough road trip in UT/CO on US-160/US-491 shook a AC vent/duct loose and cracked the black tank valve fitting and lost one hub cover.
Both units had shocks.
Now our 1st 5th wheel trailer was a '84 7600 gvwr 26' rear bath with no shocks and 4k axles/15" load D bias ply tires (before radial trailer tires). Things were a mess after a short trip in both rear cabinets even though the doors stayed closed.
The wife says if I sell her rear kitchen rv she is through camping.