Vitalik used to prefer permissive licenses to boost adoption,  
believing they encourage more people to use and build on his work.  
He also disliked copyright, favoring the "copyleft" philosophy.  
Now he’s shifting toward copyleft as open-source goes mainstream,  
with big companies like Google and Microsoft embracing it.  
Plus, crypto’s competitive landscape makes profit-driven motives more obvious.

Vitalik’s shift to copyleft is awesome, showing how open-source is thriving and big companies are finally catching up with the trend