... I get what some say about the hair follicles being beat up. But what's left of mine is 1/4" so a non-issue. If you have hair, wear a hat. Bald rules in these cars, though.
My wife will often say something about her hair hurting in the speedster, but it's a non-issue for me as well. Bald might not be the most handsome look (debatable, and irrelevant)-- but it is, by far, the most practical hairstyle imaginable, and not just in a speedster.
I married young, just as my hairline had begun to recede. Within 5 years, I looked stupid enough that I just broke out the buzzers- first on a number 2 setting (1/4"), but eventually on a number 1/2 (1/16"). I've not used shampoo in 25 years. I look the same whether I spend 30 seconds or 30 minutes grooming. I've not paid for a haircut in my adult life. Buzzing tight beats shaving (which I've also done) by a mile. If you shave your head, you better be ready to reshave every couple of days. A nice tight buzz lasts me 2 weeks.
Plus, I'm pretty fully aerodynamic. I've come to think of baldness as a gift.