I agree and I think it's potentially huge. Think of how much money is spent on compute for CI pipelines which are calculating 99% of the same values today that

I agree and I think it's potentially huge. Think of how much money is spent on compute for CI pipelines which are calculating 99% of the same values today that they were yesterday. Under this model they'd only have to compute the parts that changed. And it's not just saving on compute, very fast test results is a dev force multiplier.