That was an interesting read Kevin, didn't get through all of it yet. Funnily I rode tonight without a helmet as I wanted to wear my headphones and listen to some tunes. Man what a luxury that was. You typically cant ride with tunes in the woods as you end up ripping your derailleur off, I don't have a derailleur (YAH). Did pinch flat though and had to push that heavy turd 2 miles out. Running 10psi and want to run less so I need to go tubeless.
When I was racing in Europe on the road Pros didn't wear helmets, nobody wore them training.
I built my machinist a pretty sweet road Ebike . He is 65 and hasn't ridden a bike since he was a teenager, pretty out of shape.He loves riding again. He wants to start commuting his 12 mile each way commute . Now tell me that aint a positive change in his life. He don't wear a helmet either.