Just one small disagreement…electronic shifting on bicycles. I have had my hands cramp up on longer rides in humid/hot conditions changing gears manually. Electronic shifting makes a difference, especially when shifting a lot and you are out there for a while. Triathlon bikes are using them now as well, they allow for more aerodynamic designs because they don’t have to deal with mechanical cables anymore.
I switched to a safety razor years ago. I use about $10 worth of blades a year and just use bar soap for lather.