It seems to me what you're saying is that your ability to think like a sprint has degraded but that your ability to think like a marathon has improved. Both of

It seems to me what you're saying is that your ability to think like a sprint has degraded but that your ability to think like a marathon has improved. Both of those are measures of speed and can be boiled down to a rate, even though they have very different characteristics. Both of those can also be quite valuable in different circumstances and completely useless in others. Just a matter of finding the right environment that can make the best use of your thought process at your given stage of experience.