I agree with the convention vs. LYS analogy. I love KH and Rav for different reasons. KH provides info, tips, companionship, etc. while Rav is a great place to document your stash, look up patterns, and something I do often...get inspiration by looking at other peoples' projects. I love to walk through other folks projects (like ArtLady1981's) as they inspire me to broaden my knitting project horizons, work on my techniques (like blocking), and explore yarn/project combinations. And the comments on patterns from others who have used the pattern are incredibly useful. Also, as I have limited ability to move around, having my stash recorded is a blessing...for both me and my family as I no longer have to say "run and get my yarn boxes" several times a week because I can't remember what I have in my stash!