The reason it doesn't work is that 1 is a scalar while i is a vector (with magnitude 1). The Pythagoras theorem works with scalars, not vectors, so you'd get 12 +12 = 2.
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The vast, vast majority of chips produced are "old generation" chips used for relatively mundane purposes. The high-tech stuff you see in the news is a minority (though it's pricey enough that it doesn't look that way in company earnings reports).
Think power supplies, middle-of-the-road CPUs, ASICs for common I/O like USB and ethernet, timing devices, and wireless communication modules.