Thread creep... Adolph Sax worked hard trying to perfect the metal clarinet, but gave up and invented the saxophone instead! He also perfected the bass clarinet... which is why it looks rather like a saxophone, I suppose.

There's nothing wrong with polymer instruments - in fact, the Susato whistles play far better than many 'traditional' metal ones. As others have already mentioned, it's the skill of the player and the choice of music that matters!