How many devices/operating systems even use memory tagging? iOS, macOS and GrapheneOS, I think that's it? And iOS/macOS only use it for the kernel, a subset of system processes, and I think applications can opt in to it.
Heck, Google may have even hampered MTE in Pixel 11 (since support has been disabled) and Snapdragon 8 Gen 5 only got basic support.
We are moving way to slowly adopting hardware mitigations and memory-safe languages.
There's some positive news from the GrapheneOS devs on Pixel 11 in the past week that's worth reading up on. The MTE hardware feature is still there, they're just not sure why Google disabled it
I am well-aware, closely following them on Mastodon. That's why I said may have hampered. There may be some CPU errata that posed them to disable it.
They said:
> It isn't clear if there are serious CPU errata or it simply performs very badly.
Meaning it's there but not terribly functional. They also said it's unreliable.