I updated Post #10, with a description of the Drow that accommodates the results of the poll.
The essence of the Drow archetype seems to look something like this:
Drow - Elf, Evil, Matriarchy, Spiders, Darkvision.
Notable for setting options but less essential to the Drow themselves seems something like the following:
Subterranean, Slavery, Nocturnal.
In sum, Drow are an Evil Elf with a matriarchal culture that venerates spiders. They can see in total darkness.
An optional setting might want to have the Drow live deep in earth, with a slave-based economy, from where they only come above ground at night because of sensitivity to daylight.
The poll results appear to be stabilizing, albeit options on the cusp of a cluster might shift to an other cluster depending on future voters.
Suprisingly, the abilities of the Drow (Dex, Cha, Wis, Int) seem nonessential, albeit the prominance of Dex and Cha are clear enough.
Im curious where the Drow magic resistance fits in. I suspect it would be nonessential, since the Drow racial spells didnt make the cut.
In the original 1e Monster Manual, the essence of the Drow is to be ‘weak’ at fighting but ‘powerful’ at using magic. But the way the concept evolved across editions, they became powerful at fighting by means of Dexterity, despite having weak Strength. Their martial prowess seems to have become more important than their magical prowess, but not by much, and both seem nonessential. With regard to the Drow, it is their culture that defines their archetype, not any particular capability that they have. In this case, it is the ‘fluff’ that matters, not the ‘crunch’.