Maybe a supercomputer from a 1980s perspective.

What an absurd take. If we use FLOPS as a crude measure, the Air would be comparable to the leading supercomputers of ~1999/2000. There's many reasons why that's a very poor comparison but ignoring the absolute insanity of the raw compute available in a pocketable, thin, battery-powered handheld that you can buy literally this week, is ridiculous. Modern smartphones are nothing short of sci-fi when compared to even recent living memory. We're simply used to them due to their sheer ubiquity.