Beyond a question of Avogadro version numbers, packages can certainly backport bug fixes, which is one reason for tracking February 2024 Live Updates 
Yes, that was me. There don’t seem to be many Mac users installing via cask, though (350 over the last year) vs. ~450 already downloaded from GitHub.
I think the concern was that sometimes updates can take longer before they end up in Proposed. As an example, Fedora Rawhide still doesn’t have an update.