Earlier quoted context omitted.
I switched into software dev full time at 50 and took a new software job at 52. I'll be 55 y/o this year and I highly doubt I will switch jobs again, I like the org and the work. Prior to that, starting at 45 y/o I was a part time dev and full time firefighter-paramedic (14 years total). Covid scared me to becoming a FT dev.
Did you ever see any way you could use your dev skills to help the other job?
Then I started doing some more automation stuff. Nothing super interesting and mostly bespoke stats gathering.