It's officially in public beta, and it's awesome. I have been a Drafts user since roughly forever. I've been as all-in on Drafts as I could be since version 5 launched. The missing piece was notes on my Mac - most recently, I'd been using the built-in Notes app. Notes is nice, of course. It's really good for most people. My big problem with it, though, is not knowing where anything lives. Most of my notes were in Drafts. Some were in Notes. I had to search in two places at best. At worst, I couldn't get to the stuff I wanted from my MacBook.
No longer.
As soon as the first private Drafts for Mac beta launched, I moved everything that lived in Notes to Drafts. Now I know exactly, instantly where all of my text lives. It's in Drafts. All of it. Not most of it. All of it. I never have to think. Not having to think is perhaps the best benefit of a good system.