I think many of us were suspecting that our stock coils were getting weaker over the years, and figured why not buy them a little early, and enjoy rather than wonder. Also, many of us had increased the fuel & air flow (pumping more thru the engine than originally) and we wanted to make sure we were indeed burning it all & completely.
Also, when some people suspected that arcing from the spark plug wires to the frame or coil might be damaging the ignitors, I asked the question on this forum, as to whether anyone using Knology coils or at least the Knology spark plug wires, ever had to replace the ignitor. Nobody said yes. I know that does not prove anything, but it doesn't hurt either. It may have had more to do with riding in the rain...who knows!
