Bookmarks - we all use them. Sometimes. Maybe. Maybe not since like 2011 in my case (I really, really don't like bookmarks). But bookmarks have remained a relatively unchanged experience on desktop browsers even since the Netscape days - you CTRL+D, the page goes into a list, maybe that list has folders, and that's that.
This stale experience has helped give rise to read-it-later apps, content aggregators, and even social networks (Pinterest, for example).