It was informative to read about people's experiences with Di2, particularly in regards to if the derailleur hanger is bent.
I was also wondering, what are people's thoughts on wired vs semi-wireless Di2? My understanding is that semi-wireless Di2 is only an option in the disc brake versions of the 12 speed group sets. For people who have used both, what are your experiences? Are the wires a frequent cause of maintenance for Di2 users?