Way back in 1983 Ann and I met a chap from Santa Cruz
who worked for Bill Lee at the Santa Cruz
boatworks. He had built himself a very nice mid-thirties foot sloop
in the SC format, butwith a cruising layout. He had put a clear panel (polycarbonate IIRC) in the hull
just under the saloon
table, and it was kinda cool to sit there looking into the sea when anchored (this was in HanaleiBay on Kauaii, and the water
was very clear).
But, the panel was constantly fouling with various critters, and he was getting weary of having to clean it every couple of days.
Doing a whole boat like that is a pretty bad idea structurally, aesthetically and practically. Other than that, why not? After all, musicians are always right???