[opan]

>All the other lines set options to their default value, which is pointless.

I kinda like doing this for some programs, both as a way to see the current settings at a glance, and to avoid issues if defaults change in an update. At least twice mpv has changed default behavior and ruined my day. Once when they made scrolling vertically change volume instead of seeking (trying to match VLC?), and once when they disabled subtitles if the language matched the audio. Both easy to fix in the config file, both cases where I liked the default until they changed it.