How do functions like alloca allocate memory from the stack?

One thing that scares me a little is whether there are younger developers, say, 25-40, who can and want to pick up the mantle of Windows internals gurus.

I mean, Chen has decades of winternals in his head. Microsoft has been gutting their staff for years now. When the Petzold/Chen generation hang up their spurs, does Microsoft still have a critical mass of people who understand Windows from the metal up?

Only passingly related, some fun rust stack-allocation insanity by my 17yo son:

https://ogghostjelly.github.io/slog/alloca.html

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