A lot of ammy riders that I've seen get to a certain level and get too big for their britches, think that they don't need anymore help, and they all eventually phase out. The pros that have lasting power, got to the levels in a time where it was much easier.
I think that the Olympics modeled that perfectly. As our older pros are starting to take a step back, the younger pros come in to fill their shoes, but can't really keep up. I don't really know exactly why. I think that we're in need of a reform to make it more possible for eligible Ammy's to move up, but I'm not sure how we would go about it. Nobody is going to give anything away, and sometimes that is what a good ammy needs, mentoring, horses, whatever.
I have a horse that could easily do the upper levels with a pro. Will she with me? Probably not. Why? Even if I had the time and talent, I don't have the money. If I had the money and time, it seems more doable, but who knows if I have the talent. I won't ever know really, because I don't have any way of investing in myself to find out.