I understand your frustration, I sometimes have it myself when trying to figure out something obscure. And this kind of "knowledge rot" is indeed becoming a hug

I understand your frustration, I sometimes have it myself when trying to figure out something obscure. And this kind of "knowledge rot" is indeed becoming a huge issue in the main search engines. Arch Linux provides awesome documentation though. Slackware still follows the old ways iirc. For *BSD, I'd personally stick with OpenBSD, but not sure how great you can expect it to be as a distro.