Whatever you might think of that 1997 example, it’s not the same issue, since it’s just a static page. As the page scrolls vertically by 1 cm, the word you’re focused on predictably moves vertically by 1 cm. I assume your quibble is that you might have to follow an odd shape to find the next word at a line break—but at least you know where the current word is.

Whereas in this post’s animations, as the page scrolls vertically, the word you’re focused on also jumps to an essentially random horizontal position (as a discontinuous function of the scroll-dependent widths of all the previous lines). You can’t scroll without losing the place of your current word.