Also, lots of the ut functions already exist as decades old unix tools.

Those tools either don't ship with, or exist in wildly different forms on Windows. It's particularly bad for curl, which might be the real curl.se curl or Microsoft's confusingly-named Powershell alias.

I could definitely see using this in a cross-platform build or installation environment.

Windows and *nix systems are often used for very different things so I don't understand why there would be need for some kind of universal superbinary. And thanks to WSL you can already get GNU coretools running in Windows anyways.

I lead a large-ish open source software project. We have developers that need to build on Linux, macOS, and Windows. It's useful to be able to get everyone bootstrapped with as few steps as possible and with as few dependencies as possible. For our uses CMake works well as a universal superbinary, but I'm always on the lookout for tools that can reduce developer friction.

Gerald Combs of Wireshark? Wow, thanks for all your hard work!