12-Speed Shimano XT Review: Lessons After 2,500 Miles - BIKEPACKING.com
First Look: Shimano Brings Electronic Di2 Tech Down to Deore XT, Adds Wireless Connectivity and 11-46 Cassette Option - Mountain Bike Feature - Vital MTB
XT Di2 First Ride - Shimano's Less Unaffordable Electronic Drivetrain - YouTube
Shimano resurrects electronic shifting for MTB, but with a caveat