For anyone searching on this, a couple days after I asked my question here the register published some data on this question [0]. They report copyleft licensing

For anyone searching on this, a couple days after I asked my question here the register published some data on this question [0]. They report copyleft licensing of open source projects fell from 60% in 2012 to 33% in 2019. The percentage of copyleft projects continues to fall the ratio appear to be leveling off towards perhaps 25% copyleft (GPL-like) and 75% permissive (MIT-like). [0] https://www.theregister.co.uk/2020/01/17/mit_apache_versus_gpl/ https://www.theregister.co.uk/2020/01/17/mit_apache_versus_g...