Comment by pflenker

The same argument would apply to any other kind of will or testament. You need to update it frequently. It’s not uncommon for people to change their mind quite late, and (at least in Germany) that’s perfectly possible even until late. If people dispute this later change of mind a judge needs to get involved, and being married to one I can tell you that they treat each case differently and with the appropriate care.

Arguably the best qualified person to decide what to do with Future You is Present You.