...which I think depends on their own personality and family situation, and every family structure is different.
Glad you said it - every family structure is different.
The advice given in this thread will not work for everyone. People need to make a judgment for themselves whether they can accept sharing mneumonic phrases with relatives and/or loved ones.
You are right on the topic that you may not want to share when you are alive, that much is true, it all depends on the family situation. I am happy to share it with my wife, not that share cares lol, but at least I could share it and let her know how to cash it out in case of anything bad.
But, some other person may not feel comfortable with it, and there are even people who sign prenup before they get married, meaning they won't even pay money after divorce. However, letting someone know what to do, your wife or your husband or children, or even lawyer if you have to is important because otherwise that money is forever gone, and that would be a shame.