The GDPR flagged this as a "TODO" item and left it explicitly there, so someone was at least already thinking about it.

I sometimes wonder if it is going to take a massive Estate Law court case to push the needle on this. We're about to the point where "Grandma's Steam Library" is going to be big enough in expected cash value that descendants would meaningfully fight over it, and open up the can of worms that is current digital goods laws. (Including the fact that technically Grandma's Steam Library has *no* survivorship guarantees and Steam's TOS, like most TOS agreements in current digital services, terminates along with the person it was contracted with.)