The default act of MPV is to quit just after finishing playback of the item; however, when autoload = yes, it automatically activates keep-open = yes. And if I changed that option to no or added it (keep-open = no) to mpv.conf, it quit just after playing the current item. To close MPV, I must manually press Q/Escape or click on X to close MPV.
Although I am aware that it is a small matter, it would be a good idea to close MPV automatically after the final item in the playlist has finished playing.
Furthermore, it would also be a good idea to shut down the computer after the last item in the playlist has finished playing.
I like mpv+uosc and use it by default, especially for Linux users like me. However, since these options are available in other media players like SMPlayer and PotPlayer for Windows users, I'm not sure if they are legitimate or not.