It's for predictability in upgrades. Homebrew allows you to separate system packages (from apt or dnf) from user packages (from homebrew) [1]. Running apt upgrade or dnf upgrade can render your system unbootable if you're unlucky (or unstable or degraded if you're less unlucky). Running brew upgrade can at worst break some of your own user's setup or tools.

Since everybody runs their own unique permutation of apt or dnf packages, adding as little as possible will keep you as close as possible to what distro maintainers test. There's even OSes like Fedora Silverblue or Bluefin or SteamOS that ship with a fully baked _image_ - where installing system level packages is strongly discouraged - which helps ensure predictability and stable upgradeability.

Homebrew packages also tend to be more recent (this depends on your distro of course) and don't require elevated permissions to install.

[1]: Other unprivileged package managers like Mise or Nix do the same of course

Yes. I daily drive pop os now. Hate to use flatpak for anything. Only install core packages, google chrome and vscode using apt. Almost everything else is installed using homebrew. The idea is have a base stable system for UI and basic shell. Usually get the latest packages from brew. Earlier same base system but had distrobox with arch toolbox. Planning on using this scheme going forward, especially since while I love rolling release, they sometimes might have regressions which I don’t want to deal with right away. And these regressions can be both at system level or user packages level. Having a stable base helps significantly in daily driving linux in real world.

You can have multiple versions of tools installed. But overall, homebrew plays well with atomic distros. They are thing in itself, yet getting more popular lately. Im using them at home and on the server, and it feels calmer, because I can't fuck up whole system easily. Considering I'm using llms without sandbox often, this is pure gold.

Homebrew provides access to a massive catalog of software, including many tools that are not packaged for Fedora, Debian, or Ubuntu. Homebrew relies on a high level of automation in GitHub actions, which ensures users get the latest versions of tools quickly, rather than waiting for distribution-specific repositories. The Homebrew approach also decouples the underlying system from what you choose to install in user-space.

You can run Homebrew on Linux without admin privileges. Useful e.g. for shared hosting.