He is quite unusual in his habits, but considering that he is probably a more high-value target than the majority of us, I'd say his approach has served him well.

https://stallman.org/stallman-computing.html

Scroll down to the point titled "I am careful in how I use the Internet."

How is Stallman more high-value than a software developer working in a tech company? I'd say the opposite is true.

I don't think that was the point of the parent comment. Obviously Stallman's system is not perfectly secure, but it may well be immune to exploits that require arbitrary code execution like Meltdown and Spectre.