[ThrustVectoring]

I've got an extensional definition but not an intensional one. That is, I can look at two programs that do the same thing and tell you which one is simple, but I'm not sure what all goes into it at what weight.

One thing is code execution paths for later debugging. All else equal, code is simpler if everything you need to figure out what something does is in one place. Basically, minimizing the distance you need to travel in order to get related information. Keep variables closer to where you use them, etc.

There's some programming language specific stuff. A for loop that does a mapping is more complicated than calling a map on the collection. More generally, a program is simpler if it uses more specific abstractions, rather than using a very general abstraction in a highly specified way.

Likely, there's more than I'm completely forgetting but will recognize as general principles that I use.