I see a lot of people pushing memory safe languages, far more people than actually write systems code.

What is your primary language?

Many of those people have experience writing systems programming code before UNIX and C got widespread outside Bell Labs.

Mac OS was originally written in Object Pascal + Assembly, just to cite one example from several.

Nice deflection, but you still didn’t answer the question.

Have you ever written in a memory safe language like you’re telling others to do?

Yes, my dear, plenty of times since 1986.

Turbo Pascal, Turbo Basic, Modula-2, Ada, Oberon, ...

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My primary language is JavaScript, but I use Rust when I need to write more low-level (or higher performance) code. I certainly haven't been writing kernel code or anything like that, but I think it's fair to say that I practice what I preach when it comes to using memory safe languages.