Like I've lost my mind........
I count 19 builds going currently in the stash. Most of those were started in the '80s, however. As my building skills began to approach competent in the late '80s, I felt the need to reproduce almost every detail. Needless to say, I got bogged down and would put aside projects when I hit a roadblock trying to figure out how to reproduce something. Now that I've figured out how to approach some of these impasses, time is the issue.
I've learned to forego some of the detail to actually finish a project or two.