Reminds me of cpanel, from the late 1900s: https://en.wikipedia.org/wiki/CPanel
The debugging was also impossible, because logs were not in the expected places and standard grep on log and conf files would give you nothing.
Cockpit is way better than that. Partially because of systemd, but also dbus and other relatively new APIs in the Linux plumbing layer, which finally allowed us to implement consistent and stateless management UI of a system.