What value is Windows adding here?
Windows is mostly the default; if you buy a computer it comes with Windows, if your employer gives you a computer it comes with Windows and with some employers you aren't even allowed to replace the OS, so having compatibility with Linux (and Android?) is a plus for devs.
Another advantage is that the drivers for Linux might not yet exist or be stable, while the proprietary Windows drivers probably exist and work.
But, people didn't care. OS/2 didn't actually provide any real features, and there wasn't much OS/2 software out there so it didn't take long until it was irrelevant.
Granted, in the case of WSl things are less obvious, but Windows really needs a hook to keep developers in. But all I see is new features allowing you to run GUI software in WSL as well.
As someone who has disliked Microsoft since a few years long time, it's amusing to see how the things changed.
Also don't even start about laptop experience. Poor battery, bluetooth issues, unable to change display brightness. Now I have newer thinkpad which is linux certified and most problems are gone, but for example trackpad experience is still much much worse than on windows.
Yes, maybe I could spend numerous hours to find/develop workarounds and money to replace all my hardware with linux compatible one, but why when I can use OS which works with everything I plug in and also use all linux software I need in WSL.