I'm coming up for 52, and I sometimes regret not having gone further with music in my life (whatever that actually means in a practical sense I don't know).
But lately I've realised that actually not being obliged to do it for a living is what has kept it still being fun. It's my little thing, my way of regulating my emotions, meeting some cool people, having little musical adventures and friendships etc. It hasn't had all the joy beaten out of it.
And that's what keeps me in the game. I still find it interesting, I'm still learning new things and being curious. If this had been my job, I doubt I'd still be getting much enjoyment out of it. I'd probably be some bitter old bloke. Instead, I have a lifelong companion as long as I've got an instrument to hand, and doing that with other like-minded people is a great feeling.