I read the article and I really liked that the author tried to make it seem as simple as possible that you don't need a degree or a deep understanding of how CPUs work to understand the issue.

However, one thing that bothers me is that the author claims it's possible to retrieve private keys or root passwords by triggering a faulty revert from the instruction that resets the upper bits of a register. Where is the demo results? All I see is a small-enough gif that looks like the Matrix terminal text scrolling through. Is there any way (other than running the exploit program myself) to check the results and see that it actually leaked the root password and other information?