EmuParadise has removed its entire library of retro game ROMs and ISOs

[Gentlegamer]

Steamboat Willy might enter public domain soon, but not the character of Mickey. Disney would never let that happen. If nothing else, they would claim that the character is a corporate trademark that they could own indefinitely.

Mickey Mouse is entering the public domain. Derivative works based on Steam Boat Willie and Mickey Mouse will be allowed. Trademarks cannot prohibit use of public domain characters or works.

Patents last for 20 years and protect far more valuable information, there's no reason copyright should last much longer than patents, especially when talking about the actual game programming for depreciated platforms.