I did some basic simulations in Ngspice using Kjwaves as a waveform viewer and it worked pretty well for my purposes (I did end up editing a little of the Kjwaves code to fix some issues I had with autoscaling axes, but it was pretty minor). The interface is comparable to using HSPICE + Awaves in my experience. http://ngspice.sourceforge.net/kjwaves.html

The bios at the end of the paper clearly state that both the Ph.D. student and the professor are from USC, not UCLA.

When it stops being profitable to continue scaling transistors. The reason we scale is because it makes chips cheaper, faster, just plain better, meaning Intel and AMD (and others) can sell it for lots of money. If scaling no longer achieves that goal, you'll see it end in a heartbeat (just like you saw clock speed ramping come to a halt once it wasn't selling like it used to).