I just returned from 26 days on Venture from The Gambia to London along the Atlantic coast. I've sailed extensively on SS, SB, and Regent, several cruises on Odyssey, Ovation and Encore. This was a non-expedition itinerary, so I don't know how I should have researched this, as some posters say. But I was disappointed in no submarine excursions (though I did have dinner with a few submarine drivers 🤔).
When we were anchored, we took Zodiacs ashore to meet our excursions, which as stated above, required life jackets which were discarded ashore to be picked up for the trip back to the ship. Wind and salt spray. When I asked why tenders weren't being used, the answer was, "But you wouldn't have this experience "; I expect Zodiacs on polar itineraries, not on this. Tenders too expensive? More fun to make multiple trips in Zodiacs so those submarine drivers have something to do?
BTW, crew as always, friendly and accommodating, if a bit stressed at times. And yes, few passengers in Colonnade at night. Maybe Seabourn's future is in expedition sailing, but not mine. I've done all that. Seabourn: build a new classic ship!