I’m in my late 50’s, and I still love making software, maybe even more now than when I was younger. What’s happened to me over decades as a professional is that I’ve totally lost any interest in “career” or the large corporate entity that employs me. Once any organization grows beyond about 20 people, it starts to become dysfunctional, so I’ll be retiring the day I can convince my spouse we have enough money. That will give me more time to work on things I care about, including software.