User blog comment:Ieatrice/New Image Galleries Available in Labs/@comment-4018164-20141020175606

I'm happy to hear that it's not a default feature. In wikis on which a single gallery contains a variety of crucial images for the article- especially some gaming wikis- previewing only some images by default and spreading them on a larger sheet, might not be ideal for that particular community, where you expect the average reader to use the gallery to quickly access info instead of searching for the text in some paragraph in the page.