3 ms·
https://en.wikipedia.org/wiki/GNU_General_Public_License#History https://en.wikipedia.org/wiki/GNU_General_Public_License#His... has some coverage of the change
by cmsj 11y ago
https://en.wikipedia.org/wiki/GNU_General_Public_License#History https://en.wikipedia.org/wiki/GNU_General_Public_License#His... has some coverage of the changes that various versions of the GPL introduced.
tl;dr is that v3 places a much broader burden on entities releasing GPL software, wrt patents and the general digital freedoms of users.