It's a super gross, super hostile move. For those that don't click through, the real f-you aspect here is that until recently Shimano's own site bragged of its

It's a super gross, super hostile move. For those that don't click through, the real f-you aspect here is that until recently Shimano's own site bragged of its compatibility with Hammerhead, so presumably people bought Di2 equipped bikes based on that promise -- and now have had it jerked back. I'm not affected -- my bikes run SRAM -- but if I were a Shimano user, I'd be pretty damn angry. It's a petty, smallminded move.