For example, let's say I have feeds from 25 news sources and the President gives a speech on Ukraine. I end up with 25 articles on it, spread across my item list; I need to process it 25 times. IME, most items are duplicated at least once - half my items are not needed.
If the feed reader would group all the Biden speech articles then I could process it once - pick the item I want to read, delete the rest. That's also more efficient because it's easier to compare the items.
Online news aggregators like Google News already do that, so the technology exists, but I haven't seen it in a feed reader. I also wonder if the LLMs could group them more accurately.