Comment by devkit1

If I understand the issue correctly, it appears that this change primarily impacts casks on macOS. In fact it looks like it may only impact casks. Casks are used to install binary packaged software, often in the form of a dmg or pkg file on macOS. Most people I know are not installing too many casks, and most of the ones I've seen install signed binaries anyway. The important thing for me with this is that it doesnt appear to impact homebrew's ability to download, compile, and install open source software. And that is the main thing I use homebrew for. I believe that is true for most people too, but I fully expect to learn very quickly if there are a bunch of taps in use by people that distribute unsigned binary installers of software for macOS. :-)