A lot of people do use carpet. However, I don't really like it on a sea going boat. I guess it made a too big impression on me when seeing salty, mouldy carpets hung out to dry, heavy, falling back into the ocean, and someone not the owner diving
to recover it for them. Once salty, it will always be damp.
However, some friends of ours have carpet in the center of the saloon
only, and it has worked well for them.