Are there any official (ie. published by Chaosium or its licensees) sources on what the Deep Ones (and, secondarily, similarly "human-scoped" creatures: ghouls, Mi-Go etc) of the Cthulhu Mythos are up to in the 21st century, and how their society adopted to the challenges posed by the advancements of the era?
I remember having read in Delta Green (an official fork of the CoC universe, as far as I know) that the Deep Ones (my primary interest) have mostly retreated from the affairs and the ever more vigilant and omnipresent, augmented eyes of humanity, having their "job" considered done. Yet DG - itself a bit dated now - is just a take on the possibilities, and I wonder whether there have been others.
Also, if you have an unofficial, yet original theory besides the answer, or you've encountered one, you're welcome to share it.