Sorry, I don't have any links to share, since if I get n links proving my point, there are m links disproving my point, both of which are correct. But I'm an industry insider, having worked in PE before, and even my old firm acquired a small data-science and Ml-oriented firm, inspite of being very traditional and white shoe. Also look at the rise of quant divisions in banks and the shut down and consolidation of traditional Sales and Trading desks over the past 15 years.