I work as a teacher helping adults become developers. I do this at a few different schools as a consultant periodically during the work year. This year, I will have a lot of classes, and some of them will run in parallel, making my life quite busy.
My MacBook Pro has now passed the five-year mark, and its economic lifetime has ended. It still works well, but I worry about the stress and impact it would have on my life if it broke during one of the busy periods. I decided to upgrade preemptively but still keep the computer as a backup if something happens.