Thanks for debunking these myths! I'm definitely keeping this around for the next time I run into these (an almost weekly occurrence).
My organization has been an early adopter of Web Components - we've had them in production for three years, and they've formed the core of our (wildly successful) design framework for two years. We keep running into these myths about them, but it's really fun to tell people that, if they're using the official theme, they're already using them and they just didn't realize it.
I wrote up some stuff about what we've been doing here, for those that are interested in what kinds of problems we tackled and how we dealt with them.
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