Originally Posted by jimc101

Expensive - no, they are just standard parts now (for Shimano, for expensive, see SRAM XD cassettes) (go back 18 months and you were correct)

Exotic - no, they are just standard parts now (go back 18 months and you were correct)

Won't work with road RD's - they will if your running 1x and a RD with the correct t count