Like that has been said, the numbers of those with out failures will be light.
This group is a bit self selecting,,,focusing on this problem.
Still the number of failures are significant. And with this admittedly small sample, time correlated to usage.
A speculative conclusion 1 in 3 bikes will have this failure in the 20=40k mile bracket
1 in 5 bikes will have this failure in the 40-60k mile bracket