That's starting to be a more useful type of transom size for dinghy boarding, swim platform,
fishing,
diving, etc
I continue to be surprised at how poorly many modern catamarans are set up in this regard, with relatively small sized and poorly arranged access to the water.
It really shows a lack of appreciation by manufacturers regarding how a
live aboard cruising boat is used, especially at
anchor where the crew are often in and out of the water, and in and out of the dinghy, multiple times per day.
Almost everything that comes aboard over months or years of cruising comes via the dinghy and the transom - kilos and kilos of
food,
shopping, and supplies, all on a regular basis.
Trying to tie up and move the crew and those supplies on and off via a tiny little transom step, sometimes in a choppy anchorage, with both
boats bouncing around, can be a real pita... And that's without even mentioning any of the performance or handling related aspects when underway.
But I understand why, and that for the manufacturers it's actually about minimising length, for
marinas, for perceived size brackets of potential owners (who may baulk at a 50ft
LOA, even if it's really a 40 something footer in volume), etc, and about creating the maximum volume within that minimised length.
Of course that is that total opposite of what makes a good
multihull, which is to be long, slim, and light, relative to other factors.