> What's the most widespread fundamental gate in the latest fab processes nowadays? Is it NAND? Typical standard cell libraries have hundreds of cells, includi

> What's the most widespread fundamental gate in the latest fab processes nowadays? Is it NAND? Typical standard cell libraries have hundreds of cells, including cells representing logic such as muxes, full adders, and other frequently occurring clusters of gates. Logic is mapped to these in the way the tool finds most optimal. So I don't think it's right to say that there is a fundamental gate in modern processes. Unless you are looking at it from the electrical perspective in which case the fundamental gate is the inverter.