Ah I understand, so in the circumstance you're thinking of it does generally run quite well, but there might be hitches or areas of lower performance that would take a bit more work to get performing perfectly. Without someone directly responsible for those areas as that are changes hands a few times no doubt, eventually it's reached launch time and no one took responsibility.

I recently started working with a large organization and it's made me empathize with how these behemoth pieces of work can miss seemingly obvious issues. People probably noticed, but no one did anything about it since it wasn't in their work stream anymore.