It depends on your accounting, so I like to leave the door open for debate. The Linux kernel does have a good case if your metric is total installs. If you go by market share, Windows might have had the highest proportion ever in the 1990s (not sure, but it was dominant).
If you count by "dollars went to OS vendor for the OS explicitly" then yes. Otherwise Android phones alone is like Apple+Ms combined in terms of installs.
That's exactly my issue with going by market share. By installations, desktop Linux is massively successful compared to where it was in the 90s even though its share is low.
