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I thought the main issue was now heat dissipation.
For some reason the clickbait title ender

"and the XYZ May Surprise You"

Bothers the hell out of me. I don't know why, it just feels so disengaged of my time. Makes me feel like they think I'm a child. Is there any research as this?

I cover that at the end. I was just having fun...

Oh, and before you complain about the title, most of my titles are boring by design. I finally got a chance to do something different, so I took it

At this point, I assume any article that relies on click bait titles are lacking in depth.

"Will this vegetable cure cancer?" No, it will not.

"This new productivity hack may surprise you!" Chances are it's just some repacking of some old idea and won't surprise me.

A specific vegetable may not cure cancer but staying away from Class 1 carcinogens certainly will prevent it: things like Asbestos, Plutonium and Processed Meat.
Learn the one simple trick that internet users HATE!
TLDR: clickbait headlines!

; )

That kind of title sends me straight to the comments rather than the article :)
We can get more transistors by going 3D, but what about the heat? The real tragedy has been the degradation (although not yet death) in Dennard Scaling.

And even then Landauer's limit will begin to rear it's head around 10,000-100,000X lower power. Reversible computing is an option, but does not cover I/O and will furthermore set us back in performance and transistor efficiency.

If memory serves correctly, about a year ago there was a shift in Bitmain Bitcoin miners towards a 3D chip architecture that was fairly effective; it might be a domain specific application, though.
Had to look up those two terms, from Wikipedia:

Dennard scaling, also known as MOSFET scaling, is a scaling law based on a 1974 paper co-authored by Robert H. Dennard, after whom it is named.[1] Originally formulated for MOSFETs, it states, roughly, that as transistors get smaller, their power density stays constant, so that the power use stays in proportion with area; both voltage and current scale (downward) with length.

Landauer's principle is a physical principle pertaining to the lower theoretical limit of energy consumption of computation. ...

At 20 °C ..., the Landauer limit represents an energy of approximately 0.0175 eV, or 2.805 zJ. Theoretically, room‑temperature computer memory operating at the Landauer limit could be changed at a rate of one billion bits per second with energy being converted to heat in the memory media at the rate of only 2.805 trillionths of a watt (that is, at a rate of only 2.805 pJ/s). Modern computers use millions of times as much energy per second.

[But there's a limit to how far we can improve that leading to hitting it around 2050].

Modern computers using millions more is a little misleading, since a lot of that goes to architectural overhead and other things than single bit computations.
> A modern transistor is 1000 x 1000 x 1000 atoms.

Um? A silicon atom is something like 0.2 nanometers. 1000 times that is 200 nanometers. We passed that a long time ago. Am I missing something?