> The nearly useless LED added to the back of the Pixel 11 likely costs significantly more than the extra die space for MTE support in the CPU cache.

How is a bunch of LEDs more expensive than literal die space from TSMC? The chip is probably the most expensive part of the phone, a bunch of LEDs at a few cents per unit are infinitely cheaper than extra die space for a feature 99.99% of users won't use.