As musicians, assuming we have been doing regular, disciplined practice for years, it is important to realize that our musical skills mature and becomes better as we age, just like a seasoned wine. Why is this realization important?
Popular Indian playback singer, Gayatri Asokan in one of her interviews mentioned how a vocalist's voice matures after the age of 40. She also, mentions how Kishori Amonkar's concerts sound so carefree and professional after Kishori turned 40 when compared to Kishori's earlier performances.
What this means to musicians is:
1. Stay (practice) long enough to see your skills and talents mature. Hang in there and do not quit too soon.

Remember the quote: "Just when the caterpillar thought the world was over, it became a butterfly".
2. Do not get carried away seeing the examples of 'overnight success stories' in the name of 'inspiration.' They are just outliers and we don't know their whole story yet. The only empirical example that is relevant is our own progress over time. Do not make the mistake of considering the exception for the norm. Ask the right questions.