What is navigation and what is state is not always clear. Example: Visit https://www.dpreview.com/ https://www.dpreview.com/ Next, we open this article: http

What is navigation and what is state is not always clear. Example: Visit https://www.dpreview.com/ https://www.dpreview.com/ Next, we open this article: https://www.dpreview.com/samples/7583235225/nikon-z-50mm-f1-2-s-sample-gallery https://www.dpreview.com/samples/7583235225/nikon-z-50mm-f1-... Within the article, we click the main photo, which opens another page with a slideshow: https://www.dpreview.com/sample-galleries/8661039925/nikon-z-50mm-f1-2-s-sample-gallery/1047586991 https://www.dpreview.com/sample-galleries/8661039925/nikon-z... As we're keenly interested in the slideshow, we use the next arrow to cycle through all 47 photos. Now that we're done with that, the slideshow has no further use, so let's hit BACK to return to the article we came from, and BACK again to return to the homepage. Doesn't work, we have to hit BACK 47 times first. Because in this case slideshow manipulation is seen as navigation, and thus part of history. Is navigating a slideshow state or navigation in itself? You tell me, it's not very obvious. Each slide is bookmarkable so it very much looks like a navigation action. And yet it does not lead to a great experience.