I was in a guild for about 4 years. Solid guild, always cleared mythic everything on two nights a week. Also, a very very old guild, going strong for ten-ish (?) years. It seems like the changes this expansion were especially hard on people who wanted to play at a fairly high level without spending tons of time to do so. Historically, we might have a few people stop playing for various reasons in any given expansion. I threw in the towel a few months ago, and noticed today that since then there's been something like 80% turnover. That's more turnover than I saw in the previous four years. The relationship between time played and gear quality is just too strong, and too unforgiving, for people like us. The Legendary Lottery didn't help either. Sad!