These kind of subgroups have been around in larger organizations for ages and it makes sense to me. In the technical conferences I used to attend, they were often called BOAFs or BOFs (Birds of a Feather). It was a way for folks to discus a specific interests in greater detail than possible in the larger gatherings.
Rotbarts are what all the other blades start out as, but then then all the other blades get sharpened. Edit: the Astra Keramic has been discontinued for at least five years, unless they've resumed production?
You've been cordially invited to join my Flat Earth Shave group. We avoid many of the intellectual pitfalls that are common to less "sophisticated" fraternities. And not only will you continue to be able to enjoy your faves, you can help fight the international Zeta Reticulan cabal, one bevel at a time.
Dang, I'd be interested in attending a meeting of both these mutually exclusive groups. My arthritis is starting to make these clubs painful.
Gentlemen, I have had a terrible day. Just read this thread and it made me laugh so much the day doesn't matter any more. Thank you all.