I agree that plug in and self contained power creates a clear line in the sand. And I'm not suggesting any change to the FC site.
What I'd like to encourage is vape manufacturer/designer creativity when planning the next best vape. If they see a market for "self contained power desktop vapes", I'd hope we would benefit from this potentially expanded market.
"Desktop" is a term appropriated from the computer world and applied to mean "non-portable" vapourizers. I know what you mean, though. The common and mostly accurate perception is that plug-in power trumps self-contained power. A lot goes into such a judgment, however, and the gap is closing. The Zion that I've been testing produces as well as most plug-ins, I think.