 With the 2000s and the emerge of peer-to-peer sharing networks and sharing in web development, a new copyright-critical developer generation made the "license-free" public-domain software model visible again, also criticizing the FOSS license ecosystem ("Post Open Source") as stabilizing part of the copyright system.New non-FOSS licenses and waiver texts were developed, notable the Creative Commons "CC0" (2009) and the "Unlicense" (2010), and a growing popularity of permissive software licenses was noticed.Also, the growing problem of orphaned software and digital obsolescence of software raised the awareness of the relevance of passing software into public domain again for a better digital preservation of the digital heritage, unrestricted by copyright and DRM.