Really just repackaged Proton, with some ridiculous install requirements including fucking Homebrew.
It's not even Alpha level software right now. But, just to argue their side: it is meant as a preview for game developers to package their games with right now, and not the general public.
I guess I don't really like the idea of a large company using a tool like Homebrew, I feel at that point they should write/include their own package manager.
I might be sounding pedantic, so feel free to ignore me if you're a Homebrew fan, but it just irks me that the package manager is installed via curl'ing a shell script from their github project, and that the entire repo itself is stored on Github.
Even Microsoft has winget; dunno why a company the size of Apple can't just roll a proper, secure way to distribute packages.
Also, as far as other package managers go, there's Macports.