Well, in the case of Peterson's deluxe system pipes, (they're not spigots), the claim was that, due to the mortise arrangement whereby the stem was made not to seat completely into it, it had the advantage of capability for disassembly while still warm. Now, in my case, as I always smoke multiple bowls of tobac in a sitting, if the pipe gets a bit wet during the smoking, will take the stem out before done to swab it with a cleaner. Never really had a problem with that with any pipe/brand I've smoked in 40+ years with the exception that I did manage to loosen the stems too much on 2 of my pipes.