That's a flagship release - but it's

  Motorola's first with a performant implementation of ARM Memory Tagging Extension

with more cheaper variants following. MTE is the hardware capability that GrapheneOS relies on for its claims of security (along with coding practices) and it's the reason GrapheneOS has only been released to certain Pixels to date.

(2023) https://security.googleblog.com/2023/11/mte-promising-path-f...