Thanks, and glad to hear! Yeah... having it connected to IntelliJ was something that seemed always 'around the corner' for years. I think I will forever be annoyed working on projects without having something like this around—so hopefully someone will get to it eventually.
It seems like there is more interest in this 'direction' these days though: I saw something new from the Firefox dev tools the other day whose time-navigation felt very similar (I'll see if I can find it), and the Clojure REBL project feels philosophically aligned. And I've seen a few others.
Using it in VR would be awesome :D
Edit: I think this was the Firefox devtools thing I was thinking of: https://developer.mozilla.org/en-US/docs/Mozilla/Projects/We...