On the development of skill and how that accumulates with age

I have been considering development of skill and how that accumulates with age – once you learn to ride a bike do you ever forget? Swimming, playing a musical instrument, in fact any skill once learned seems never forgotten. If not practiced we lose some measure perhaps but once a skill is acquired a little practice goes a long way. Tai Chi is the same, put in the work to learn it to a reasonable level then you can keep improving well into old age because it is largely dependent on our ability to pay attention and to feedback into an embodied skill.