Do you mind if I ask your background (age/education/training level)? You ask a lot of questions that make you sound like you're a student pilot and it would be helpful in explaining stuff if I knew where you stand in terms of basic knowledge.
I'm a student, university level, and a student-pilot. I'm writing an assignment on disruptive technology for one of our classes. I chose to writing about turbine engines, and while I was writing I just realized that turbine engines have been disruptive in every part of aviation except most of general aviation, which is why I went here to maybe get an answer why that is the case.