What would the advantage to not have it lowered be? Like you're sitting there, sails down, anchored. Why would you go "Nope, better if keel isn't lowered"?
> Why would you go "Nope, better if keel isn't lowered"?
We don't know yet. The rumour is that the mechanism of the extendable keel was prone to banging in the lowered state. You don't want to be disturbing the sleep of the guests paying you fortunes. That plus the also rumoured fact that the operating manual only required it to be lowered when sailing could explain why the crew did not opt to lower it at anchor.
All of the above is based on internet whispers. The investigation report hopefully will answer this question with authority.