I am not being sarcastic and I use it and I have used it for years. I consider myself a "hardcore greybeard", or a neckbeard, which is what you actually meant ;P
I don't agree with the support thing though. Most Gentoo users are knowledgeable; developers are always on irc/forums lending support; certain commands such as `emerge --info' make it easy to figure out what the state of the machine is regarding flags/masks.
I hate Gentoo with a passion. Being able to pick versions and set flags means that, between any two Gentoo installations, the difference is likely bigger than any two Ubuntu 16.04 installation.
I think it just creates more complexity for support scenarios.
I'd definitely not recommend it for "serious desktop use" unless you are a hardcore graybeard.