95% of what I listen to is younger than me and my knowledge of when it was made and often even when I first heard it is sketchy. Makes for more a personal time frame than a real world one. Some I know but a lot is stuff I dig out by type and just don't notice or remember.
Not now but once as an individual a little over 50 years ago and then as a couple 5-6 years later. Both times were invaluable. Won't all that easy to do though.
Literally there is no advantage to an individual. They only work on specialized surfaces and where are you going to find them and what's going to be there to feed on? No real driver to develop them , either. Really only useful to carry more weight than an individual can by itself. Not a real...
In a sense they've had them forever. Several insects ,amphibians, crustaceans curl in a ball as a means of travel. Since a wheel is essentially a section of that sort of round shape that needs a suspension for support, the concept seems much the same. Of course I may clearly be missing your...