I have a lot of trouble with Homebrew on multiuser Mac systems. Running `brew install ...` or `brew update` as anyone but the user who originally installed Homebrew almost always fails because of permission errors (or it successfully installs, but then causes permission errors in the future for the user who installed Homebrew). Whenever I need to use Homebrew commands now, I use `sudo -iu otheruser` to switch to the user account who first installed Homebrew in order to avoid the permissions issues. I'm really baffled that Homebrew doesn't support the multiuser system case. Is it so rare to share a system nowadays? I've had this issue on multiple Macs and fresh installs, so I don't think this is some fluke bug.