and new stuff V. old stuff. RJ over on the Westsail 42 rebuild had opted for MARELON® thru hulls. This certainly seem the way to go as they have been around for some time and meet all Certifications etc. They are appearing in more and more boats. I have no logical disagreement with this technology, its just that when it comes to basic boat stuff I'm old fashioned. I love the heft of bronze and its been around since .... the "Bronze Age".
I may change my mind a few years into the "Marelon Age".
A larger discussion is the choice between the old style stuffing box and the PSS Dripless Shaft Seal. I come down firmly on the side of the old style stuffing box, especially for cruising sailboats.