In late 2025, there are plenty of alternatives:
Linux FreeBSD NetBSD OpenBSD DragonflyBSD Haiku Plan9 Redox ReactOS Debian Gnu/Hurd FreeDOS Genode SculptOS
And probably some others I haven't heard of. Using Windows in 2025 AND complaining about it is complaining about a self inflicted wound.
The more likely option than any of these excellent free options is going to be MacOS… just because your average user with even semi-technical inclination does not want to use LibreOffice Present; they want PowerPoint.
I have just seen this first hand with my significant other: they are very technical and more than capable of it, but have zero interest in learning Linux and instead just bought a MacBook on Black Friday specials when their 5 year old HP laptop finally got too annoying to use.
Having a job that requires Windows is not what I would call self-inflicted.
I think it would be less daunting for many if there were 1 or 2 popular alternatives to rally around. Including window managers / desktop environments. (Granted, it's nice they can all coexist peacefully.)
Haiku is very pleasing in an eyecandy sort of way, but that's sadly all it has going for it.
I personally wouldn't use it as a serious OS.
I have one machine that runs Windows (apart from one Windows 11 VM on my Mac laptop I use for work), all this nonsense has got me to install Fedora on a separate M2 drive on it, and I haven't booted up Windows in a few days now. Will be an interesting experiment, I've run it before but more for fun, but will try to go as full time on that computer as possible.
I literally only use Windows for games. And I guess now RealityScan which is gaming adjacent.
If I had the confidence that I could play a new release on Linux day 1 without trading an enormous amount of performance, I wouldn't need Windows at all.
My boomer mother in law could handle Linux whether it be GNOME or KDE. What she cannot handle is not being able to put in a DVD of Turbo Tax 20xx and double click the install button. Nor can she handle not having the native Outlook client, or Microsoft Word.
Yes there are alternatives, and possibly even good enough web versions of these tools, but most of the world isn’t like you and me.
Realistically only four of those are viable for modern workflows (Linux, FreeBSD, NetBSD, and OpenBSD). It would be pretty hard to use Plan 9 or Genode/SculptOS with seL4 as a typical desktop OS. Haiku is almost there, but I think it still has a ways to go before being anywhere close to adequate for my typical desktop use.
I agree with the sentiment though; nowadays Linux has gotten good enough for most stuff, to a point where I don't really see why anyone still runs Windows. If only I could convince my parents of that...