I'm here also testing the new groove X-7 RED that I shipping to Zmago monday.
Is running from this morning, you can see that Jack is running from last reset from 9 hours:

Only 4 xruns ( one every time you run a new asio host) and 22 total when I made some test mistake.
I think is really a good stable OS and with latency still at 0!
Com on...with Windows you can have this same performance??