Interesting thought, but you might be missing the hardware perspective. I switched from Windows to Linux this year, and the biggest issue has been drivers and hardware compatibility: audio available via headphones but not (laptop) built-in speakers, occasional display issues depending on the monitor setup, occasional WiFi issues. If hardware innovation stopped, Linux could catch up easily... but it won't, so there is a constant driver treadmill that manufacturers mostly handle for MS on the Windows side, but Linux has to handle somewhat alone. Perhaps the manufacturers will start to help out more and more on the Linux side too, as more users demand compatibility.