I don't think your reference shows that. The GPLv3 was released in 2007. It obviously depends a lot on the language, since each language tends to have its own ecosystem, but the massive shift to permissive licenses really didn't start until 2008-2010, which is after the GPLv3 was promulgated. C didn't tip over to being majority permissive until 2011. So I'd argue that the analysis in the graph tends to support my contention that the GPLv3 hurt rather than helped the copyleft cause.
Post 2005 is when cloud computing & the web as an app platform began to gain traction, and a lot of open source software from ‘big tech’ is either cloud or web related.
The adoption of more permissive licenses is just because the big players favour those licences.
