[Infiniti Z]

well, Kodi is not only about movies/videos - why does everybody treat the audio section as step child Then, we also have pictures and (hopefully soon) retro games, ... - would be a pitty if the logo only sold it as video player.

Well, I bet 90% of all people mainly use Kodi for movies. I can't image a lot people booting up a full-on media center just to listen to music or view some pictures because:
a) Music listening is often done combined with other activities which means it's often done on a tablet, a laptop, a phone etc. while browsing or working.
b) Most people don't spend more than a couple of minutes to view some photos, and they mostly do it on Facebook on their phone, tablet etc.

Movies/videos is the only one of those mediums where people care to sit down in a couch and enjoy it on the big screen (although, many are probably doing that on their portable devices now as well).