After my wife died, I closed out our safe deposit box at the bank and realized that not much in it needed to be there in the first place.
My home has two safes, one for documents/small stuff, and there are only a couple of items in there (car title, loan payoff letter, some unused credit cards, my birth certificate and some extra AMMUNITION (not a document)), My other safe is a small gun safe and that is bolted to my nightstand with fingerprint control for quick access. That contains my "secondary security system" (after the wired/cellular alarm system and my dog). This is Texas, and people have firearms, lots of them!
I can't really think of much else to put in a safe these days as I have no gold or silver bullion or rare coins, don't keep much cash around, have no valuable jewelry, and my Will and POA is with my daughter and filed with appropriate facilities. My daughter also has my End of Life book with all the instructions and investment information.
I keep a few paper copies of old tax returns, my closed Sub S corporation files, and a few other files in my desk file drawer and I purge some files at the end of each year. I also have a flash drive containing federal income tax files that go back a few years (in pdf format).
Trying to simplify to make life easier for me and my daughter who will have to pick up after I am gone.