The problem is that people live in space. Generally less space = less long term comfort, assuming good design of the interior spaces.
less space = less long term comfort
Not at all, the usual person not sleepimg requires about 4 sq ft of space.
Comfort is determined by how comfortable the space being occupied actually IS .
Thats it , sitting in a great fitting recliner gets zero from a 20x20 main cabin that is windowless and unventilated..
Sitting in the same chair in a boat 8ft wide with big huge windows is a far superior existence.
Its not mere volume , its great design that is needed.
Proper design required the persons aboard to be able to do their tasks with comfort and ease , a cabin that echoes is hardly required.
Hand grips for movement in rough weather are more important than the size of the piano.