What gave Linux a boost.
My guess is summer. Perhaps people waited until they have more time to switch from Windows to Linux. And holiday means less work computers – which are all Windows machines – being used.
Cloudflare Radar also shows a sudden jump from 3.5% to 5.5% from June 15 to June 29. It has since come down to 3.9%, which is still about 0.6 percent points higher than previous average.