While I broadly agree with you, don’t discount Windows so easily. It’s not finished by any means.
Organizations have a massive investment in Windows and the Windows ecosystem that they cannot or cannot easily replace with Linux. The organizational user base dwarfs the home user base (no stats, just my opinion and experience).
For the technical minded user, Linux makes a lot of sense. For gamers, I still think there is that ‘Windows is best’ mindset (that is being chipped away at but it’s still present - NVIDIA getting on board would help). For small businesses Linux makes sense. For large businesses, cost aside, it doesn’t fit for reasons I mentioned above.
Obviously that is a large generalisation, but, again based on experience, I think it holds generally true.
All of this from a home user and gamer who switched to Manjaro in January and has booted his Windows machine twice since then, only to grab files off of.