Exactly. The one thing I immediately noticed was the ~30 year old vintage Yamaha TZR 2-stroke model complete with pics of open engine etc (check the small diameter exhaust pipes). Which youngster would ride such a bike, let alone touch its internals? This stuff is very niche, maybe not so much in Japan but over here in Europe you would have to search for it or pay some decent money to get it in that condition. The owner probably has bought it in his 20s :)

Edit: the power output curve is also not for the faint of heart and there's no electronic helpers, overall very different to ride compared to a current 600cc model with all the bells and whistles :-)