The original thing has already been created, and proceeds benefit whoever created it (or who they sold rights to).
Whether they choose to continue to actively market it or not, while under copyright, can't be influenced by copyright. Abandonware under copyright is still abandonware.
But! There's a class of derivative works, built on top of the original, that currently can't get made.
If they were, we'd all be better off.
Arguably, I can even see an aggressive sunsetting for derivative works being net positive for the original work's commercial value ("See the original").
The original thing has already been created, and proceeds benefit whoever created it (or who they sold rights to).
Whether they choose to continue to actively market it or not, while under copyright, can't be influenced by copyright. Abandonware under copyright is still abandonware.
But! There's a class of derivative works, built on top of the original, that currently can't get made.
If they were, we'd all be better off.
Arguably, I can even see an aggressive sunsetting for derivative works being net positive for the original work's commercial value ("See the original").