Things I have heard, so trust at your discretion.
1. Replacing failed electronic locks with mechanical ones is a non insignificant part of the locksmith business.
2. Even if the fire rating is top notch if the house is a complete loss that safe is going to turn into an oven under the ashes.
3. The two most common things left behind in sold houses are safes and pianos. Too heavy and the cost for professional movers makes it cost effective to just buy a new one.
Assuming all of these things are true the next time I am looking at getting a safe I want to get something that comes in a flat pack and assembles with internal fasteners. I saw a really intriguing display at Pheasant Fest a few years back but don't remember that company's name. These look to be some current offerings with a quick search.
Based in Waterloo, Iowa, we’re gun safe experts that offer American-made quality and smart design with every easy-to-assemble safe!
zanottiarmor.com
SnapSafe has a variety of different safe sizes and wire accessories such as organizers and racks. In addition to safes, they also manufacture lock boxes and specialty safes that can be stored in vehicles, under beds, or in walls.
www.snapsafe.com
These guys have some secure wall panels that might also be an option depending on your situation. They wouldn't work in my current house but maybe someday.
THIS IS WHAT TRADITIONAL SAFES GET WRONG When you see it, it’s obvious Guns touch Optics don’t fit Access is slow THE INTERIOR IS THE SYSTEM Traditional safes are built around the box. SecureIt is built around the firearm. CradleGrid™ isthe system behind it. See How It Works Shop Agile Gun Safes...
www.secureitgunstorage.com