Where is the data on that? I just googled around, I don't know if this site is reputable but it would indicate mobile didn't overtake PCs until 2016 and even now the gap is not huge:
I know I've read that PC sales went down pretty severely around the 2011 date you cite, however, it could be that sales of new PCs are down much more than actual usage because PCs need to be replaced less frequently.
Where is the data on that? I just googled around, I don't know if this site is reputable but it would indicate mobile didn't overtake PCs until 2016 and even now the gap is not huge:
https://gs.statcounter.com/platform-market-share/desktop-mob...
I know I've read that PC sales went down pretty severely around the 2011 date you cite, however, it could be that sales of new PCs are down much more than actual usage because PCs need to be replaced less frequently.