Yeah.. getting it off the floor keeps flat spots off the tires.... but I have been told by older guys than me (not many of those left) that it also keeps from getting flat spots on the wheel bearings.

A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired.
1948 Chevy 2-Ton