Why are you worried about a natural-gas BOOM but not a propane BOOM?
Usually when there is a natural gas explosion it’s due to people having had worked on the lines near the house(s).
With propane I don’t have to worry about the incompetence of these workers not doing their job right and my house blowing up. It’s MY responsibility to make sure it’s safe.
Also myth busters shot a 3/4 full propane tank with a bullet. It didn’t explode. I’m not worried about it.
Besides, I’m in a rural location and there won’t be natural gas lines run in my area for decades to come.