There is already a well oiled machine for reading your secret-until-death instructions and distributing your possessions. Telling it about your private key stor

There is already a well oiled machine for reading your secret-until-death instructions and distributing your possessions. Telling it about your private key storage media and passphrase is not exactly convoluted. You could even leave parts of the key material with different lawyers/institutions, so that they would have to collude AND steal your hard drive/hardware wallet to access anything prematurely.