It has a 14/15 chance to catch any other kind of heap corruption for the standard system allocators. Since it catches memory corruption as the read or write occurs, it produces very useful tracebacks for devs. We provide them to users with a UI to copy it to report bugs to devs.

Our users on 8th/9th gen Pixels can enable it for all user installed apps via Settings > Security & privacy > Exploit protection > Memory tagging. Use the per-app toggle for incompatible apps and report the bugs to them. It's not used for most user installed apps by default yet.