I rode the farm lands of north central IN as a teen in the late 80s, usually doing 20-40m of farm roads. One evening I was late getting home after getting clipped and waking up in the ditch a period of time later. I didn't really think anything of it (I was 14, I think); but my parents went out and bought me a clearance black Brancale hardshell. It was heavy and it was hot.
These days I only wear one if I expect to go fast in traffic, If I'm running suburban errands through the neighborhoods, PT rides on the MUP, or riding the city mtb park; I just wear a cap. With all the craziness in the news, if I die on bike crash at least I went doing something I loved.