Yes, there is a thread about it. Really sad.
Probably this has been the AC where the boats have suffered from the beginning a bigger technological advancement. AC is more about that than anything else but the size of these boats, stability issues typical of multihulls and pushing the boundaries at 40k, makes them very tricky to sail and sometimes, it seems, dangerous even so it seems that in this case it was not a stability problem:
"Preliminary reports indicate Artemis’s boat didn’t capsize because the sailors were pushing too hard or made a mistake, as was the case with Team Oracle. The problem was with the boat itself, either faulty engineering or faulty construction. The boat simply broke apart under sail, folded, then flipped. The Artemis boat has had a history of cracking and problems with the carbon fiber used in the twin “beams” — the two girders that lash the two narrow hulls together. The boat had been in and out of the shed numerous times in an attempt to correct those problems. Today, however, the forward beam — the girder in front of the sail — gave way during a practice run. The two hulls, no longer connected, began sailing in slightly different directions. This caused one hull to snap just forward of the aft beam, and the mast, held up by high-tension rigging connected to the front of the hulls, simply fell over. The boat began to cartwheel, ultimately trapping Simpson underneath and drowning him.
The Oracle crash last October happened in much worse conditions, and in much rougher seas. The team was risking a turn in a twenty-five knot wind, with an ebb tide that was running at six knots."
A capsize at speed or a broken boat can have nasty consequences at 30k and that's the second one. I don't really know what to think about this but if there is another one probably something has to change. Or maybe not, maybe this dead was just bad luck. When the ORMA raced the grand prix series there was capsizes and nobody died.