[xkfm]

The problem with this tool is you can't review your extracts at the same time you are reviewing your flashcards.

For example, if you have a list of 50 PDFs and you want to incrementally read them, Polarized doesn't have a way of scheduling when you're going to read all 50 PDFs. Supermemo, you don't have worry about that. IMO, that's the key feature of Incremental Reading.

I can chuck dozens of articles at a time into Supermemo, and do not have to worry about forgetting to read them. They'll show up in my reviews over time.