Absolutely use and love homebrew on linux. All of the fun rust-based tools that get posted here on hackernews (exa, fd, ripgrep, fzf, etc.) are all there and much more up to date than apt. Heck, I find brew is more up to date than nix in some cases.

I have been using it on an WSL/Ubuntu instance just over the last few days... for some things its pretty handy (e.g. in the context of k8s I get a more up to date version of the excellent kubectx utility via brew than apt). But for others its bit of a pain, e.g. building Python through pyenv and using OpenSSL in brew, etc.

I use it when working on Ubuntu/Debian LTS systems, since the Homebrew packages tend to be more significantly more up-to-date than whatever's packaged in the LTS Apt repositories.

As an added benefit, unlike apt, you don't need root to install (most) brew packages.

I use it all of the time! It has a plethora of packages and they're often more up-to-date than the package manager of whatever distro I'm on (usually Debian or Amazon Linux 2).