Actually, insightful investigation has shown that LLMs are *no good at summarization*.
They do not and cannot understand the *meaning* of the text. So they can't pick out the most important parts.
All they can do is show you the most frequently repeated or similar parts. And often, that's the *least* important stuff:
It often takes lots of evidence to reach a conclusion. And you have to eliminate alternative theories.
Volume is NOT importance!!!