Yesterday, there was a earlier recorded interview with Hans Horrevoets on Dutch tele. The interview was made, I think, during the stopover in Capetown.
He was asked about the risks and told the reporter that the main focus was on staying on the boat. He admitted not to wear a lifejacket all the time.
He also mentioned that during evening and night, being tethered/clipped was obligatory on ABN/AMRO-2. They also were tethered during the day in rough sea. Because of this urge to stay on board (see above), the decision to clip during daytime normally was made in an early stage.