I have a slightly different take on this: I save the text that I care about, and have some automation set up to archive the source URL of the text to archive.org[1] (which works well enough for me, even if it's not 100% perfect, because I'm only archiving it for the greater context of the highlighted text, which I rarely go back to).
I just got myself an Nvidia 4090, and I'm looking into using local LLMs to feed my data into (I think this is called retrieval augmented generation?) for various assistant-type use cases.
I'm particularly excited to potentially be able to go through my saved Kindle highlights for multi-novel sci-fi and fantasy series in order to refresh my memory by clarifying key story beats before continuing with the next book.