In fact, just about any plant or animal species which humans have chosen to cultivate and selectively breed varieties of has recognized and meaningfully applied breed or variety names. The difference with cannabis is that there’s never been anyone to hold names accountable, and so there’s possibilities for very different things to be...
"Genetic drift" is often used to describe change in appearance/behavior of a clone variety over time. However, this may not be the correct use of the term.