Vitalik: Previously supported permissive licenses, now more focused on Copyleft

Ethereum co-founder Vitalik Buterin posted an article stating that he has always supported permissive licenses because he wants to maximize the adoption and dissemination of his works. Releasing under a permissive license helps achieve this because it clearly indicates that anyone who wants to develop based on my work doesn't need to worry about any issues. Furthermore, from a philosophical perspective, I don't like copyright and appreciate the copyright left ideology of "using copyright against itself." However, this idea has now changed, and I am starting to pay more attention to Copyleft because open source has become mainstream, making it more practical to push enterprises towards open source. Companies like Google, Microsoft, and Huawei are embracing open source. Secondly, competition in the cryptocurrency field is becoming increasingly fierce, with everyone focused on profit.
(Note: Copyleft is a concept and licensing method that is the opposite of traditional copyright. Copyleft licenses require that derivative works based on the original work must also be open-sourced and open under the same licensing method, so that the work maintains the characteristics of openness and sharing in the process of dissemination and development.) [Odaily Planet Daily]