Out of curiosity, do have any citations on how those exercises don't enable learning? On the latter part, there used to be a hard mode at least in browser mode

Out of curiosity, do have any citations on how those exercises don't enable learning? On the latter part, there used to be a hard mode at least in browser mode where you could have it force you hand type every word. I always really liked that, but then they got rid of it. Of course with the heart system these days, I wouldn't last 5 minutes if I tried to do it that way so such is life I suppose