> Would you buy a car with a legal backdoor that lets the builder take it back after a few years.

Plenty of people lease. One way of looking at this is that Congress has kind of said you can only lease copyright (of certain types) and the maximum lease term is 35 years. Other jurisdictions have similar things with different names.

You could get different terms, but I'm sure you need clout first. Of course, the majority of my output is work for hire and I retain no rights and can't terminate it later; oh well.