Kevin nailed it. Change is a hard pill to swallow.
One of my coaches imparted a bit of knowledge on me years ago that has shaped my life and how I developed as coach. Its about checking ones "premise". I took it as: I'm the one that has to look myself in the mirror every morning and be "okay" with who I am, and ask myself if I doing the best I can as a coach for my students? am I keeping up with all the new techniques and transitions that they may encounter? This is one of the reason I came to find 10th Planet, I was looking for stuff that my guys may potentially run in to. Then I fell in love with it, and realized the 10th Planet System checks its premise as well everyday. Its not afraid to evolve, its encouraged. Its alot of damn work, drilling and trying to master the core components of the system, the modifications and then all the new shits thats constantly being added. Its what makes the system so different, and people don't like different.