Materials science research and development in the microelectronics industry has dramatically reduced the size of transistors and, in $2012,$ Intel's marketing group claimed that $100$ million transistors could fit on the "head of a pin".

www$.$intel.com$/$content$/$dam$/$www$/$public$/$us$/$en$/$documents$/$corporate$-$information$/$history$-$moores$-$law$-$funfacts$-$factsheet.pdf

At that time, Intel was producing devices at the $22-$nm node. Unfortunately, it has been over a decade since the technology node size $(22$ nm in this case$)$ and the physical size of the transistors were evenly moderately close to each other. Today, the node is primarily a marketing tool with $2$ and $3nm$ in production $($along with numerous varient to sub$-$divide the $2nm$ node$)$ and $1.$x nodes being developed. The industry continues to use this nomenclature partially to describe progress along Moore's Law. Research the actual size of a typical transistor as a function of the technology node and make an estimate for the actual number that would indeed fit on the head of a pin in $2012$ and today. Was Intel marketing stretching the truth?