Many applications simply show updated articles as new and unread ones which makes sense if the article actually changes a lot and is updated with a significant amount of information. In most cases articles are updated with fixed typos, and showing them as new articles isn't helpful at all.
What we maybe could do is use a levenshtein comparison between two articles and silently update articles that don't change much. We would just need to find a happy threshold.
Some things that might be difficult would be something like images and video where if the article is mostly images and/or video. Changing an image without changing its location doesn't affect this at all, and even adding a couple of images to it doesn't change the article's markup much either, so maybe weigh changes on images and video markup more?