> maybe there are some prominent start-ups in that field?
I have one for you. It is called readwise [1].
They recently showed some cool AI experiments [2]. They could eventually solve some of the problems you cited like better search with natural language and better Information overload management with controlled summarization.
Feedly (already cited here) is the mature "News Reader" app. Readwise is the cool “Read it later" app. The perpective is difference, but they do share a lot of features (including AI powered ones)
[2] https://twitter.com/deadly_onion/status/1592990487257829376