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I interpreted it as meaning “by default”.

amd64 and arm64 have no default heap configuration, they don’t even know what the heap is. Same is true for their 32 bit equivalents. If he said Linux based OS’s or Windows have non executable heaps then I’d have kept watching because yeah you could assume he meant “by default”. Instead he blamed the processor and not only that but only 64 bit processors. It’s a massive misunderstanding on his part.

By default on some os.

Doesn’t strike me as a misunderstanding at all—my current cpu/os combo also doesn’t ship with an executable heap. This strikes me as lazy editing, but not a clear misunderstanding.

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