Comment by strcat

We didn't propose enabling MTE for apps not opting into it any time soon. We proposed enabling it for the base OS by default. Pixels are already testing with HWASan and MTE so there are few issues found by it in the base OS. Enabling it for the base OS and apps opting into it would be a great start. Requiring working MTE support for ARMv9 in the CDD is entirely doable, and then devs will have devices with it, and it can be made into a default for apps at a new target API level with opt-out instead of opt-in. It can then be made into a mandatory feature at a future target API level. Android makes dramatically more aggressive backwards incompatible changes via target API levels than detecting memory corruption without false positives.

We know they're actively testing HWASan and MTE builds, but not with enough real world usage. If they tested it a lot on actual devices used by Google employees, they'd have fixed this Bluetooth LE audio issue before the release.