I don't think homebrew has more user than say apt or pacman. Maybe there are a bit more people running osx than linux, but much of them are not devs or "power users" and never run homebrew.
I have friends working on debian based distro, following their discussions on a lot of dpkg packaging intricacies is crazy. However that also means it's mature piece of software that handle many cases under the sky of software packaging and distribution.
Pacman, erm what? Arc is a niche of a niche. I'd bet Alpine's package manager sees more action than that - let alone yum/rpm.