And later, when computers weren't so slow but still required multiple fans and HDDs (using real metal discs!) you got an auditory indication of resource utilisa

And later, when computers weren't so slow but still required multiple fans and HDDs (using real metal discs!) you got an auditory indication of resource utilisation. I do wonder what we'll say in the future when we look back at computers from this time - perhaps it won't be so much an auditory clue, but the subtle feel of one's phone getting warm in your hand when it is running all cores at full clock?