MacUpdate is a longtime-running, and extremely well-established, Mac app review site. It is well-known within the Mac community, and savvy Mac users will often consult it when looking for software reviews and alternatives. Currently, MacUpdate already shows listings for several of Obsidian’s competitors, including:
Why would a beta release alienate new users? Those interested know what beta means. Furthermore, Obsidian in beta has been behaving like a full-fledged app that is being updated and having more features added to it.
For comparison: Typora has been in beta a number of years, it is not even clear if it will ever be taken out of beta. Yet many people use it, and in internet searches it is often listen, and in markdown note-taking app reviews it is invariably included.