Updated: Oct 23, 2020
If you sat down and you worked on just that for 8 hours a day for several weeks by yourself in a room with a pen & paper and a computer do you think you could find some reasons for the decline?
pretty easy right.
If you spent hours and hours researching the history of the sport trying finding things that changed over the years within the sport and in life itself that may have had an effect on the sport could you find them all?
The obvious ones are
2. Danger/ injuries
3. Lack of places to ride
4. Legal issues/Lawsuits
4. Public Perception.
5. Evolution which really hasn't been very good for this sport
6. Track changes that made the tracks more extreme and much more capable bikes.