I've clocked 51 years of programming, started at 13, I'll retire next year, but wont stop programming.

I think the important thing to do is to keep reinventing yourself, change and do different stuff every decade or so

Almost 50 years of it here, starting in high school in the early 70s. With breaks here & there. And no longer for bread & butter: now it's a hobby. So no need for reinvention: just sticking with C-syntax languages (now Go) with a side of SQL, finding that the luxury of modern tools and modern languages (and modern processors' speed) greatly reduces the sources of aggravation and frustration. No more burning an entire day trying to stomp out a single bug, and unsuccessfully at that. Steady improvements across the board create a new world of (relatively) straightforward translation of thought to software.