25 years without a failure. You are either really good, really lucky or just about due. Murphy is a relentless person. I have been flying for over 30 years and just experienced my first throttle servo failure on my last flight of the day near dusk of a giant Piper Cub. After flying it it in a holding pattern at 1/3 throttle for over 30 minutes, the last 10 totally dark with no moon I felt pretty darn lucky to be able to land it followed by mostly stupid for not having a backup method to remotely shut down the engine. If it would have been any other type of plane than a big, slow yellow Cub, I don't think I could have seen it well enough to fly in those light conditions. So I was lucky and dodged Murphy once... I doubt I will be that lucky again so I am installing remote electronic kill switches as my choice to protect both my fellow fliers and my investment.