In reply to Jerome.

This is a really good point, Jerome. And it was discussed over years and nothing has been done. Wordpress has become real CMS and is not only blog paltform so it should handle large galleries properly by default. It is essential to give user flexible possibility to create own folder-based structure for media library which is tracked by database (Now only year/month structure is available).

What is more, I have not found any (!) reliable plugin which could fix this problem. Funny thing, all wordpress sites are easy recognizeable by image paths like: 'wptavern.com/wp-content/uploads/2014/06/example-photo.jpg'.