If you know what both WSL and Guix System, your first reaction might be a bit of a surprise. WSL is Microsoft’s Linux subsystem for Windows, a proprietary operating system that embeds candy crush ads in the start bar that is less stable than its alternatives, and everything it stands for screams corporate, while GNU Guix System is a free OS trying to be as pure as possible, both in terms of being immutable and also avoiding non-free software (not just proprietary, but also non-free source-available software). Guix is the antithesis of Windows.