I missed this one a few days back
Brett Terpstra and Fletcher Penney (Mr. MultiMarkdown) are coming up with an nvAlt replacement that might be promising. nvAlt grew long-in-the-tooth, and I stopped using it a year or so back. And, with Drafts now available on macOS there might be less of a market for ‘nvUltra’ or whatever comes next. But it’s good to see the work has been reinvigorated with Penney’s involvement and something, finally, might come of it.