I think writing down your master password, or the hard recovery keys, on a piece of paper, and storing that with your lawyer or in a safety deposit box accessib

I think writing down your master password, or the hard recovery keys, on a piece of paper, and storing that with your lawyer or in a safety deposit box accessible by your lawyer/executor of your estate is the correct way to go about this. I feel like there isn't really a strong need for a purely technical solution here, when the problem of "get information to person or persons after my death" has been largely solved by the legal and banking system.