I'm over 50 now and feel like this as well. Haven't used Claude yet but used Codex a bunch, and it's been SO MUCH fun going over all the old perl & shell scripting stuff that I used to do years ago before I got into healthcare time and morphed to a hobby sysadmin.

Staying up and re-learning what I used to love long ago has given me a new found passion as well. Even if I do vibe code some scripts, at least I have the background now to go through them and make sure they make sense. They're things I'm using in my own homelab and not something that I'm trying to spin up a Github repo for. I'm not shipping anything. I'm refreshing my old skills and trying to bring some of them up to date. An unfortunate reality is that my healthcare career is going to be limited due to multiple injuries along the way, and I need to try to be as current as I can in case something happens. My safety net is limited.