Slackware may not be huge, but it is the base distro for Unraid.
Never heard about Unraid, but I hear about Slackware all the time.
If you can manage a Linux server, you likely have no use for Unraid. If you want to put together a Synology type appliance out of PC hardware to run Docker containers and uses ZFS for backups, Unraid is a fairly user friendly option.
@hibby @razieltakato I have an Ubuntu server with ZFS I’ve been using for a while. Haven’t seen the need for unraid personally.