Technical explainer:
https://github.com/RupertBenWiser/Web-Environment-Integrity/blob/main/explainer.md#how-it-works
It apparently requires some kind of proprietary operating environment to function, thus making it compatible with free (as in freedom) computing. You would need either a proprietary library/OS or an open OS but a proprietary piece of vendor hardware to act as the attester.
That's because the same issues are affecting both millenials and gen Z. Economic stagnation for young people as well as climate change are multi-generational issues that began before our time.