It seems they stopped working on it in April 2022, for the most part:
https://gitlab.com/nakst/essence/-/graphs/master?ref_type=he...
https://gitlab.com/nakst/essence/-/graphs/master?ref_type=he...
"Thank you. I am not working on it at the moment. But I would like to return to the project when I have more free time ;)"
He's busy with something else.
Would have being nice if it in Rust. The video gave a lot nice insight to having a tabbed window based UI. It makes it more like browser. That idea can very much be adapted be used in project such as Fomos or even create a WM in Linux/FreeBSD.
You can toss together a shitty biplane but at the end of the day you can’t make the engine or the full size fuselage and there are no mechanics or factories for your jet so nobody is ever going to use it.