Bernie,
For many years I supported large networks and the secret to all of them was to keep them backed up on a daily basis. As long as your computer does what you need it to do I would stick with it and just keep it backed up. My wife uses a very old Windows pc that I built decades ago and she uses thumb drives to keep "must have" info safe. By the way, her very old windows system runs very well and is very simple to use compared to my Windows 10 laptop.

Deane