You're assuming everyone is using the same version of unicode and the same fonts. Even this premise isn't true. For example, for me, it never changed because I

You're assuming everyone is using the same version of unicode and the same fonts. Even this premise isn't true. For example, for me, it never changed because I do most of my typing/etc on an older system without modern unicode extensions post-v6. It was and is always a mess. There's no stability like you say. But if we want to measure something objective: the majority of unicode versions have been the firearm, not the water pistol.