In marketing we would call this case studies, or testimonials, if the story is told from the first person. This is useful to convince people when they can see themselves in the "protagonist" of the story. However, it also requires someone to be interested enough in the product (in this case, an objectivist approach to audio) to read the damn thing. I think a FAQ and case studies / testimonials can coexist, but they serve different purposes.
The FAQ is to save existing members from re-writing the same responses over and over, and to save new members from getting testy responses from old members who are tired of writing the same responses over and over - beyond that, I think we are talking about diverging objectives that may be better served by other types of content.
There is a broader point here - if someone has already spent real money on audio-woo gear... they are going to be a very tough nut to crack because it's hard to admit a mistake, especially a costly mistake, and likely some of their personal pride is wrapped up in that decision as well. We shouldn't put a lot of effort into trying to convince those people. Very low yield.
The target market for new ASR users is the person who is *thinking* about dropping >$200 on gear, but hasn't yet, and may have been exposed to some of the SBAF or AG style nonsense. Someone who is still looking for answers, not someone who thinks they've found them. The FAQ could be very helpful in steering those people in the right direction.
Bingo - we are dealing with potential scope creep in this thread. Let's focus on cataloging the common questions and answers to save us all some keystrokes.
Would definitely be good to link to a glossary, or if one doesn't exist already, create one and link to it from the FAQ.
Probably no one individual is going to volunteer to own the FAQ for eternity. However, anyone posting on ASR who knows their stuff has time to contribute to it, by definition. So from time to time the mods should review the FAQ and make sure it's up to date, and if not, ask for assistance from knowledgeable members for edits.