Many retro gamers argue that since Capcom no longer sells the original GameCube disc (they sell ports or remakes), the preservation of the original code is a matter of history. The "Abandonware" argument suggests that if a company refuses to sell a specific version of a game in a modern format, archiving it is ethical, even if not strictly legal.
This is the biggest driver. The official PC port of the original RE4 (pre-remake) has a modding scene, but it is clunky. The ROM/Emulation scene is robust.
