Whoa! I didn't know they finally widened the 20/20! I heard someone recovering from a shoulder injury say on a podcast last week that the 20/20 bars they bought were too wide and my brain went all wonky because I thought they were saying 720mm was too wide.
I didn't get along with it for a front tire, especially coming from the previous XR3 which I thought was an incredible front tire for XC. I feel like they weren't quite sure whether to go all tee way with the side knobs. The side knobs have a big footprint, but then are low to begin with and then actually ramp down toward the center section.
I always thought that the Pure-V had too much of the WTB whale tail on it and made moving around on the saddle more difficult. To me the Volt is the same saddle with less cushioning - and hence the same issue.
I wonder how much of OEM saddle spec comes down to looks in promo shots. A Silverado might not be comfortable for a majority of people, but it looks pretty good in photos.
I tried out an old base model Deva on your recommendation. It is a step up in comfort from the Silverado that I have been running on all my bikes for years. Another plus is that with steep seat tubes all over the place, the short nose gives back a bit of room between seat and stem.
Shimano has been halfway decent with Di2 compatibility. One example I can think of is that 11spd Ultegra brifters can pair with an Ultegra 10spd derailleur and work just fine. There is also compatibility between road and mtb where possible.