Hey,I'm one of the maintainers of the project and can ensure you its very much alive :)

Erik the original creator of The Odin Project, has moved on to focus on Viking. But theres a bunch of us working on improving the project.

That's great to know! The work you guys do is awesome!

Odin, iirc, is for people who are more self-guided. Viking seems to be for those who need more help (mentors, tutors, etc.)