The examples given as "things that can improve with an audience" like cycling, or weight lifting, are all things where you practice something specific. If you

The examples given as "things that can improve with an audience" like cycling, or weight lifting, are all things where you practice something specific. If you did the same demo, over and over, for five years, you'd probably do better at it in front of an audience, according to this wiki entry. But it says that things that are less familiar - demoing this new feature that you added yesterday - will suffer. Software Engineering is not cycling, or weight lifting, or opera, or ballet. It is non-routine.