He seems to see /etc/sysconfig/* only in light of systemd; which ain't true. Not only start/stop is configured there; but often you also have service configuration that goes well beyond init.d/systemd tasks. openSUSE's YaST revolves around the ability to have such simple configuration files; and not needing to be able to parse and change any and all daemon configuration files, like named.conf or httpd.conf.