So, can anyone shed some more light on what "Nextcloud" (the software/OS part) actually is? As far as I can gather it's more or less a fork of owncloud by one of the owncloud maintainers, paired with ubuntu core, and turned into a kind-a-sorta groupware and file server? But for some reason lacking an ldap/kerberos/ad/directory server - so it can't be the only part of a small office network - you still need ldap/AD set-up?

I'm not entirely sure I see the value proposition here.