Seems like good practice to me to keep digital backups in your safe deposit box. Probably a good idea to check/refresh them every couple years too. When it comes to things like house fires and getting screwed by cloud providers everybody thinks that it can never happen to them even when examples of it happening to others exist. The important thing to make sure that you're covered in the event that the rare but catastrophic event does occur. Especially when the cost of doing so is so low. For back ups it amounts to little more than a thumb drive and a visit to your bank every couple years.