You must be unfamiliar with Qualcomm's brand.

https://www.youtube.com/watch?v=ZpXkJqTAY5Y https://libreboot.org/faq.html https://github.com/unnideeraj/article_backdoor https://hackaday.com/2024/08/18/reverse-engineering-the-amd-...

These are decades old, known vulnerabilities. So you can extrapolate the more clever, hidden exploits.

It first takes getting our colleauges/people to care about not buying backdoored products - knowledge of these is pretty low and people don't flock to alternatives yet.