We've been through this, so many times, so I am not going to go through the whole explanation again Suffice to say that it's in development and nearing the release date
https://youtu.be/-bdYXvptx4Q
For more info, go to Krin's profile...scroll down a bit until you see the video above posted by a guest account named 'Sherif'
What do you mean Unity has failed? It is still one of the most succesful commercial game engines. And Krin did note that he liked it a lot due to its potential in his last update (which admittedly, was quite some time ago).