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GeneRF wrote:

The numbers quoted for various generations, such as TSMC's 4 nm are pure fiction; merely a label. Real dimensions have not been used as generation names for more than 20 years.

The first part of that statement is absolutely correct, but the second part i am not sure it's been 20 years.
4nm is feature size now, before it was transistor size. Last i checked when 7nm was in use, the transistor size was 14nm in total, or similar.
And personally, i am still not clear on how they get usable 4nm features with 13.5nm light source (molten tin hit by two lasers, all at 50000 times per second) etc, etc, but it sure as hell is astonishing!

.5nm, isn't that just a bit smaller than 4 gold atoms ?

With the radius of a gold atom being about 0.135nm ?