It's all gaming history and a sadly-overlooked part of "Stop Killing Games".

The worst part is the licenses that do exist are non-transferrable, so by the end of this century there will be zero licenses left for these games. They'll just be expunged until they become public domain perhaps in the middle of the next century - if any copies survive.

And what's sad about that is we know for a fact games can survive and be enjoyed for decades, because we have seen this occur for the entire lineage of game-playing machines.