Last fall, I noticed that some Shimano factory-supported teams had riders still rocking the M9120 lever over the new M9220, and I'm still seeing it today. Guys like Luke-MS on Giant and Ryan G of Yeti in enduro, and other random bikes in pit videos. What could the explanation for this be? For all intents and purposes, the M9220 is a better, updated version, so what reasons could there be not to make the swap? Like, when Mavens came out, it felt overnight that everyone was using them, and we haven't (and won't) see a Code RSC on any of...