Nice comments here. I was thinking somewhat like you. I have added a lot of articles to my database since starting to use SuperMemo (that was almost two years ago). I read a piece of info I need , extract this information and then most of the time, never use the rest of the article. This article might come later, but usually I don’t have time to read it just because I would like to know more.
There is information you need to learn, and some your would like to learn. Most of the time what you need to learn fills up my time. Every day I’m more convinced that perhaps the concept is good but wrongly implemented for the most frequent study needs.
So my conclusion has been that I’m not really incrementaly reading but just studying what I need, and revising past articles further in time, sometimes this have information I was searching for and then I pick this new information. This does not seem different from the way I’ve always learn. The best advantage I get from incremental reading now is telling if I already processed a piece of text (similar to highlighting a paper book)and also searching preprocessed text fast with out going to the web twice (in most cases).
This way of using incremental reading does not look for me as the way it was designed. Hence my search for incremental readers world wide. The answer though seem to be that they are not many or none at all.
A need for efficiency seems to be more important here, so I’ll probably just stick to my sort of incremental reading, after all so deep overload of repetitions does not let me do much more.