That’s the whole point. If esp is now say 100k or so below bsp, but the stack expansion detection pages maybe don’t extend very far below, say 8k, and you call

That’s the whole point. If esp is now say 100k or so below bsp, but the stack expansion detection pages maybe don’t extend very far below, say 8k, and you call another function that requires pushing args at esp, presumably you’ll miss the stack expansion. Unless the compiler inserts intentional dead reads to force a stack expansion.