They actually offered to become stewards of the language itself when it looked like it was dead, IIRC.
I think its development has picked back up, although I'm still not sure it's getting much love, as most developers are pushed just to use GNOME Builder instead.
Being able to switch to Genie on a whim is great¹. I've used vala on a few projects, and depending on the devs involved or type of project the ability to choose a syntax is really useful.
Although, quickly scanning through the GitHub topic doesn't paint the rosiest of futures² :/
For example:
Calculator: https://github.com/elementary/calculator
Calendar: https://github.com/elementary/calendar
E-mail client: https://github.com/elementary/mail
File manager: https://github.com/elementary/files
Image viewer: https://github.com/elementary/photos
Music Player: https://github.com/elementary/music
Terminal: https://github.com/elementary/terminal
Window manager: https://github.com/elementary/gala