Since Moodle 4.0, most course edit actions can be executed using the
core_courseformat_course_edit webservice using only four parameters
(courseid, ids, targetsectionid and targetcmid). However, some actions
logic is still replicated and embed in course/view.php and
course/mod.php files since the beginning of time. Now the
course/update.php offers a non-ajax way of executing the same actions
and replace the old replicated ways of doing the same.
Laurent David