> A power user may still want to run older OS versions for a reason.
No doubt there are edge cases like that, but I don't fault a project for not catering to the < 1% of users who would fall into that bucket and would probably be the ones that cause trickier support cases. These would maybe also be the user that could just install it without homebrew then, it's not like homebrew is the only way to install software.
This is not an edge case. Most HN commenters describe the latest two versions of macOS as being objectively worse than earlier versions: slower, less stable, more broken. There are significant numbers of “power users” who deliberately avoid upgrading or have actively downgraded macOS to Sonoma because they care about their computing experience.