Too bad he's been barely working on it. I must say, it also looks very impressive... but will it ever get pass the demo stage?
It is past the demo stage though - I know people who use it and it is the only tool I use myself to look at V8 deopts (on a rare occasion when I need to).
I do answer questions and fix bugs whenever possible - so if you would like to use IRHydra and can't figure something out - just send me a mail or file a bug on GitHub.
I originally had hopes that something like this will eventually be incorporated in DevTools - but this hope has withered by now.