Something I didn't see mentioned in the article about AVX512, aside from the xsave/xrstor overhead, is that AVX512 is power hungry and causes CPU frequency scaling. See [1], [2] for details and as an example of how nuanced it can get.

[1] https://www.intel.com/content/dam/www/central-libraries/us/e...

[2] https://www.intel.com/content/www/us/en/developer/articles/t...