Lanes (https://lanes.io https://lanes.io) has highlights - although articles are secondary to tasks, for now. Diigo does highlights too, and Feedly. Agree that

Lanes (https://lanes.io https://lanes.io) has highlights - although articles are secondary to tasks, for now. Diigo does highlights too, and Feedly. Agree that highlights are a brilliant feature - the next natural step after saving an article is saving the best bits of that article.