[userbinator]

The real problem here is that, as with a lot of other aspects of UIs today, most of your users probably have no idea what that icon or indeed a lot of the others is supposed to mean. If it was just plainly marked "Reading Mode", you might get the usage increase without wasting countless hours designing an animation and having it, in turn, waste the energy of your user's machines and then having to spend even more time and energy "optimising" that animation.

Stop making UIs consisting entirely of vague mystery-meat-navigation-buttons-some-that-don't-even-look-like-buttons and none of these problems of discoverability would exist.

[peyton]

Counterexample: Safari 7 had a big blue button that said "Reader." It was literally the largest button in the app.

Usage did not change.