i doubt your age is what's limiting you, very little changes in 5 years in any case unless you're rapidly deteriorating arthritis etc. If you fell out of practice which is more likely the good news is the intricate finger muscle fibers you built up in your prime will go back to how they were pretty quickly if you start practicing again, even if it's been years. That stuff doesn't just disappear, it will be nowhere near as hard as building stamina/speed up the first time. This goes for most other forms of physical activity as well.