Good question. I am 33 & got a 105. I don't think of it as being normal or not. I think of it as a diagnostic check like you would run on a sports car. If you are a car & you need an oil change, you are still a "normal" car...you just need some maitenance.

For me, I am not as conserned about the 105 but instead how it broke down. This I'm using as a guide to know what to focus on fixing.