[kickopotomus]

You appear to be confounding a few different issues here.

1) Transistor density has continued to increase. The original naming convention was created when we just used planar transistors. That is not the case anymore. More modern processes create tertiary structures of "nodes" which condense the footprint of packs of transistors. Moore's law didn't die. It just slowed.

2) Clock speed is not correlated to transistor size. The fundamentals of physics block increases in clock speed. Light can only travel ~11cm in 1 billionth of a second (1GHz). Electricity can only ever move at 50%-99% the speed of light dependent on the conductor. What's the point of having a 1THz clock when you will just be wasting most of those clock cycles propagating signals across the chip or waiting on data moving to/from memory. Increasing clock speed increases cost of use because it requires more power so at some point a trade-off decision must be made.