Not an accurate statement.
It was about 50 years ago, and nobody was sure one way or the other.
I’ve had a pocket size HP scientific calculator that uses that tech or better in my pocket for 48 years.
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You misunderstood what I was saying.
Ten years or so ago a number of technologist were saying that we were reaching the limit of what can be done with the geometry of a transistor in an integrated circuit. That heat, lithography, materials and other issues would prevent further integration. Except that it didn’t...
1972 was the first HP pocket calculator. A little short of 48 years, but close enough...