Hello Pastel I'd take 'would' here to denote a habitual activity: 1. I would normally grab the chips => either: a) I was accustomed to grab the chips; b) I am accustomed to grab the chips. Here, we have sense b).
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Your sentence,
In spite of the fact that you [might / would] grab the chips if/when conditions were normal ...
could be written as,
In spite of the fact that you [might / would] grab the chips if/when conditions are normal ...
No, it couldn't. Rewritten as such it would be pointless in an explanation of the subtle difference between "you" and "you'd" in the original question, because both of those contain "would".
CJ
saying that the function of "would" implies habitual sense would seem to be redundant