Yep, that's the Roon produced Linux distro. I'm sure they offer something like that up for licensees as well. Personally I run a normal Ubuntu desktop/server and it works just fine with the Roon debian packages.
Roon is snappy responsive now
Applied latest version Roon server for windows and app on IPhone today. So far the annoying slowness in the user interface is no more. It’s very responsive and snappy now. Hope it stays this way.
Immediately prior I received a message from Roon containing an update on the Harmon acquisition and new product direction to focus more on its core user group of music lovers Audiophiles, etc. including focus now on application performance, which is paying immediate dividends. This is a great start so far and I hope they keep it up as promised.