[delta_p_delta_x]

We actually tried that at first.

The technical requirement of installing WSL before installing our software was already a non-starter, since most Windows users expect one installer or zip to do-it-all. WSL2 isn't (yet) like a C/C++/DirectX redistributable which can be plugged in as a dependency to a given program. Additionally our program is expected to work natively with Windows paradigms.

More critically, we work with high-performance filesystems. The performance impact of files going a round-trip through the Linux Plan9 driver, then through a Linux kernel context switch, into the kernel, and down into Hyper-V, and then up back through the Windows Plan9 driver was completely unacceptable. It was deemed worthwhile to rewrite targeting Windows natively. And even then it was only a partial rewrite: we ended up using MinGW because we had too much of a direct dependency on the pthread API.