It's a cute low profile crawler, no doubt, and handy to have if you're doing a volume of recovery work of bricked vehicles not road adjacent, however this comment:

> This is the only way it could be uplifted and taken away ..

is a bit of a stretch. There are many ways to lift and move a dead weight that won't roll - before this crawler existed there were wheel cradle axles that could be fitted after jacking making a towable brick.