yes, I know it's expensive. I have a Gx drivetrain so it would be a significant cost. But the idea of downshifting through the whole cassette flawlessly in the face of a rapidly approaching steep or obstacle intrigues me. No need to slow down as the shifting happens a lot faster. With the one-by-one shifting on my turbo levo, it can take a while. I dont know if AXS can be integrated into the motor controller so it backs off during the shifts - like the shimano e8000 can with Di2.