Quite a few people posting about the Windows experience as well in here although you only mentioned macOS and Linux, so I figured I'd chime in as well.

I posted a day or so ago about wanting to migrate from Windows to Linux[1] after the incredibly positive experience I've had using NixOS on WSL2.

I've spent the last week or so exploring both X11 and Wayland options for DEs and WMs to hold me over until I can port my tiling window manager[2] to work with either X11 or Wayland, however, there is just so much table-stakes-level stuff missing, like setting per-monitor scaling, rotations and positioning in a way that doesn't require cracking open a dotfile.

I keep oscillating between wanting to port my twm to Linux so I can just go full NixOS and developing an idea I have[3] for Windows to be able to quickly and reliably configure settings for a new Windows machine.

Honestly, if NixOS supports Windows in the future (and the ability to configure it in a similar way to nix-darwin's ability to configure macOS), that would be perfect.

Who knows, maybe SerenityOS will be running rings around all other OS-es on hardware by then and have a "nix-serenity" module set to allow for sane declarative configuration management.

[1]: https://news.ycombinator.com/item?id=33946559

[2]: https://github.com/LGUG2Z/komorebi

[3]: https://github.com/LGUG2Z/Nazm