It would be valuable to know that, but that also means knowing the power profile, cooling capability etc. In general, understanding how much "compute capacity"

It would be valuable to know that, but that also means knowing the power profile, cooling capability etc. In general, understanding how much "compute capacity" you still have left is very much an experimental science with modern CPUs. As an example of what I mean, MacBook Airs had exactly the same cores as MacBook Pros (up to 13" Pros iirc), but while you could max out one or two cores on both (and get "200% usage" that is comparable), going past that would mean entirely different things due to one being passively cooled. With x64 platforms, TDP discussion is even more relevant even without getting to ARMs big.SMALL or Intel's P/E core distinction.