I think the answer is : nobody is being replaced, and certainly not by AI. These companies have been over-hiring for decades now, for a variety of reasons, and layoffs before quarterly reports are nice because they pad the bottom line without having to increase revenue. "Ai layoff" is a nice way to phrase "economic restructuring" without spooking the investors. Hell if you're lucky it might even get you a bump on the stock market.

I've been in the industry for a few years now and can guarantee you there are not enough systems deployed to replace workers in any significant numbers, and those that exist are far from good enough.