Yes, you can thank Disney for the extension, it used to be 75 years. There was a 20 year hiatus of works entering the public domain because of the extension.
Printable View
I run a Dragon AGE game without a ruleset or published/licensed modules (I made my own) and leverage the MoreCore Ruleset and custom dice rolls that Damned created. Ultimately it comes down to a matter of your commitment to play your unsupported system or modules and willingness to create the content yourself.