Most pipers who have a few or more pipes have run into excessively oxidized Vulcanite. I sure have. But the first pipe I ever bought, which I still have, has a Vulcanite stem, and like most of my Vulcanite stems, this one after forty years is still in good shape, not perfect but responsive to a good polishing. I've had one or two others that got gritty with oxidation after every smoke and I replaced one with complete satisfaction, with tortoise shell acrylic. But at least half my pipes have Vulcanite stems that are a little softer than acrylic, durable, and a pleasure to smoke.