The pixel 8 was exciting because it was the 1st android smartphone which broke the usual 5 years of update cycle and jumped to 7 years.
The Pixel 8 also has MTE support.
Pixel 8 and Pixel 8 Pro are ARMv9 devices supporting hardware memory tagging…Hardware memory tagging is going to provide a massive increase to protection against remote exploitation for GrapheneOS users. It’s the biggest security feature we’ll be shipping since we started in 2014.
The Pixel 8 also has MTE support.
https://discuss.grapheneos.org/d/8439-mte-support-status-for-grapheneos