Slackware-current or slackware-current64 is the main release channel. https://mirrors.slackware.com/slackware/slackware64-current/...

There's dvd iso's available the slackware-current branch, usually built about once a week by AlienBOB

Guess you could call it a passion project, but after all these years of dedicated tireless work that seem to resemble more of a machine than man, seems that doesn't completely sum it up. Hope he keeps it up, its pretty much the only pure distro left (or maybe I dislike systemd that much)