[harimau777]

> I don't understand how that's an argument for the length of the copyright either way?

One argument might be that, compared to other media, video games' continued availability may be particularly dependent on whether or not they become public domain.

If video game hardware quickly becomes out of date and old games lose their economic value quickly, then the copyright holder may not be motivated to put in the effort to keep the game available.

However, an archivist motivated by artistic or historical rather than economic value may still be willing to put the effort into keeping the game available if it is in the public domain.