"From my perspective, Windows is an inferior system to any UNIX-based system on almost every front. It has a very strong application ecosystem, but technically it's unpleasant to work on"
I suppose this depends on the workflow. Powershell is just as powerfull for me as bash (I can't help to learn the syntax for either of them - I just google the expression for iterating a command over files and whatnot)
I start applications with a shortcut - on windows this is windows key + plus a few starting letters of the application name.
That's about all I need from the OS.
"if there's something I want an OS to do that Linux can't do, I would be motivated to work on making Linux able to do that thing so I could do that thing on an Open Source OS I enjoy using,"
This might be the main difference- for me the OS is just an underlying substrate to support my programs I want to run and develop. For third party apps - once I'm in the application the OS pretty much fades into the background unless there is a problem - and quite a lot of the code I write is pretty much platform agnostic.
The main point of the OS for me then is, how much of it works unobtrusively out of the box. And since windows comes in the box for off the shelf hardware it's the easiest for me.
I did do dual boots in the past but now I don't see the point anymore for desktop use. For some document batch runs I've not yet found equivalent for windows world for so for those I see the value for a virtual machine. My NAS box runs linux and it's pretty sweet.
So are there anything that actually locks me on windows? Visual studio is really, really nice for C++ development and that alone would be a sufficient reason for me to run windows. And then comes the sweet, sweet surface pro with its fantastic pen - basically, that combined with Manga Studio takes me to a place of digital art bliss (no, I'm not a paid advertisement - I've used digitizers for two decades and drawn all my life I know what I like - even if just for a hobby).
That said, I don't trust proprietary stuff for anything of value - i.e. data and programs which I would like to be able to run always - but the windows platform offers currently the best platform for the creative activities - coding and art - that I do at home.