When diecast drag cars and muscle cars came out it unfortunately took away my motivation to finish my models, instant gratification, I didn't have to put in the work to get the car I wanted. As I get older, I would rather watch Dennis Taylor finish his hot rods, than go out to the garage to work on my project cars. When my grand kids get older , I will get out the unfinished models, and I'm going to resist being picky about how they paint or assemble them, it's a great way for kids to learn the parts that go into a car, before they help much with the real thing. When you glue and paint the engine components and other parts of a model, you learn a lot as a little kid and take ownership of the car build.