Mid-70s in deepest cosmopolitan Zumerzet had two distinct camps:
Camp A @ 16 were on FSIEs, etc, @ 17 RD250s, etc on L-plates and with full licence, GT380/550/750s and the odd 400/4 - riding gear generally Harringtons, jeans, trainers and the cheapest, gaudiest (Candyflake anyone?) helmets, gloves optional - summer riding only.
Camp B @ 16 were buying and rebuilding British bikes for riding @ 17 BSA 250 Starfires, etc with the odd Royal Enfield Bullet, Continental GT,etc and with full licence, BSA/Triumph 500s, Bonnies, Tridents, Rocket 3s and the odd
Jota - riding gear summer leather jackets and leather/denim jeans, winter Barbour/Belstaff with boots, gloves and good helmets (bright orange Bell Star anyone?) - all year, all weather riding.
A few Camp A are still around (too many crashes, serious injuries and deaths) and riding today's equivalents but with full leathers, virgin knee sliders, etc and still crashing with similar consequences.
All Camp B are still around and riding Triumphs, Ducatis, BMW and the odd KTM, and mostly still wearing same/similar, but armoured, gear plus Rukka,etc.
Old habits die hard, old dogs and new tricks, etc I guess.