I think the secret of longevity peel 'n stick tiles is to not flood the floor with water...ever. Think cleaning with a damp paper towel, rather than wet mop.
Yup- - -with those, one has to watch the dampness (or wetness)..... I had "peel & stick" tile on my Scamp
floor. When I removed it, every joint was outlined with a dust (polite term for dirt and filth) track...
I took the time (and the slightly added cost) and put in vinyl flooring in one piece. Even took the time and effort to remove the dinette seats and water tank to make it one piece under there too. (but wasn't too bad expense -bought a leftover chunk for $40 and still have extra) then trimmed the step-down with a chunk of aluminum angle. The Wench
is much happier with the floor now... (and so am I) We don't have to worry about me during hunting season tracking snow, etc in- just wipe it up. JMHO Larry