Disclaimer: I haven't read the article, my rant is entirely based on the title.
[a] Fork That Promises Better Features
Have they released anything yet? Or are we at the project stage, where they're yelling at their CLI confused about git?
Promises are cheap, releases matter. I mean I could announce a project called Betterfox, promising to bring better features to a well-known browser. But in reality I'm by myself, overly ambitious, and going to leave the github page abandoned after the initial commit.
A wise choice in this case. It's 23 paragraphs that mostly describe standard Thunderbird features (as the author usually does not use email clients) and only one list with three (!) bullet points of new features in Betterbird.
Edit: to save you a click, here's the list from the article (the actual feature list on the project page is longer):