I'm not yet 50, I'm "only" in my mid-40s, but for sure advancing in age has had an effect on the way I program code. For sure I won't be able to spend long hours in the night trying to decipher/solve a specific programming problem, I used to do that when I was younger.
I also used to type a lot more code, as in, my fingers used to type a lot more, I can't physically afford to do that now because after a certain threshold I can feel it in my fingers, and that feeling is not good.
I'd say that even my capability to stay focused on a specific issue has kind of changed, but maybe that's just a me thing, related to my specific life choices/environment, I couldn't tell, maybe some other programmers who have the same age as I do are better at keeping focused, or at least as good as they were 15-20 years ago.
I also used to type a lot more code, as in, my fingers used to type a lot more, I can't physically afford to do that now because after a certain threshold I can feel it in my fingers, and that feeling is not good.
I'd say that even my capability to stay focused on a specific issue has kind of changed, but maybe that's just a me thing, related to my specific life choices/environment, I couldn't tell, maybe some other programmers who have the same age as I do are better at keeping focused, or at least as good as they were 15-20 years ago.