No. There are two main ways for a work to lose copyright and enter the public domain: if its (very long) copyright term expires, or if the copyright holder ded

No. There are two main ways for a work to lose copyright and enter the public domain: if its (very long) copyright term expires, or if the copyright holder dedicates it to the public domain. However, the latter may not actually be possible under the copyright law of some jurisdictions, which is why people recommend using a permissive license instead; that applies to code as well as to anything else that can be copyrighted. Nothing is changing with respect to that; indeed, there’s no new law at all. All that’s happening now is that the copyright terms of a bunch of old works, which were retroactively extended in 1998 from 75 to 95 years, are finally starting to expire.