RWA
Look at 1.18.1 of the Taipei report. Looks like EMAS there would certainly have had a chance to contain the aircraft. But you are not entirely wrong in that it didn't go to the very end of usable pavement, but did go past the threshold of 28.
p.s. Putting EMAS on stopways would make them cease to be stopways of course. In the sense that you couldn't then park any aircraft there. Better put them just off the existing pavement.