system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If we've discovered recently that modern humans are actually a mix of Homo Sapiens Neanderthalensis and Homo Sapiens Sapiens DNA, why haven't we created a new classification for ourselves?

We are genetically different from pure Homo Sapiens Sapiens that lived tens of thousands of years ago that had no Neanderthal DNA. So shouldn't we create a new classification?
gpt
Two subspecies that don't fully diverge into new species generally won't get a separate name if they then create a hybrid.

Look to man's best friend: all dogs are *Canis Lupus Familiaris*, and a hybrid with the original *Canis Lupus* (a wolf) doesn't get a new third designation, it's either mostly wolf or mostly dog and is treated as such.

All modern humans are mostly *Sapiens Sapiens* by a massive margin, so they retain that name even though some have a low level of Neanderthal hybridization.

More generally, subspecies designation is sloppy work since the line between subspecies is typically very blurry.  Unlike bespoke species that typically can't produce fertile hybrids, subspecies usually can and sometimes this is a significant percentage of the population.