I have learned a lot at AK. There is much more to it than the Bacon thread. There are a lot of talented techs both professional and serious hobbyists that contribute.
Another thing I like about AK is their appreciation of quality vintage audio. Yes, I appreciate the high end. I have Ear, Thiel, and Audio Research gear running currently, but I also love vintage gear. The build quality surpasses most contemporary pieces and the audio is generally very good to excellent.
If you are of limited financial means (most people are), AK is a great place to find out about quality audio that is within reach. For a lot of people that rules out $500 cables. But hey, I have some nice cables, and while I bought them for a reason, they are really the smallest part of the overall equation. Decent cables can be bought for $50.
Oh and I have heard the uber high end too. Sorry, it is simply not that good. If you have the money, have at it. It is beautiful stuff. But not having it does not preclude you from a quality audio experience.