Think 2 people I knew from school are still into bikes.
Of the many I used to hang about with in my late teens & early 20's, most are dead - only one in a bike incident. There's one guy in NZ who still has MZ's. Another couple still have bikes (A10 & RE Crusader) in bits, which they have been for decades.
Even my son in law & grandson have given up bikes for the joys of hi performance cars.