Great article!
> Note that when the chip is completed, every transistor gate is connected to another transistor's source or drain (which provides the signal to the gate)
That's a very curious assertion, which made me think a bit more (it feels incorrect at first but on a second thought it looks correct)
I would think of "pure input pins" but I suppose those have pull-up or pull-down "resistors" which in silicon are actually diodes? gateless fets?