To be honest, I don’t know. I don’t think so — but, once again, we’re back to that damn tree falling on top of Schrödinger’s cat.
Take your X=A+B example: Whether or not X is updated at the point A is modified is moot, as X's value is irrelevant as long as no one inquires as to its value. The moment someone checks to see what value X currently has, though, it triggers an evaluation of X=A+B, and the value of X is updated.
Similarly, a filtered view without viewers is a meaningless concept; it’s the quality of being viewed — whether by a user or by being queried by an integration service — that gives it substance.
Now, somewhere down the line Airtable may develop the ability to trigger an action based on field value. Should that be the case, the answers to your questions become crucially important. At present, though, given the only way to determine if a value has been updated is to inspect the value directly — and, in so doing, triggering an update — it seems to me the exact mechanism used is unimportant… :winking_face:
