Comment by Nebasuke

A similar but not as strong decline. Taking the one but last datapoint for both (stackoverflow/tex respectively): 4436 and 394. If you compare this to how it looked like between 2015-2020 you get (my guess from scanning): 160,000 and 1700. So Stackoverflow as a whole went from 160K -> ~4.4K. That's like a 35x drop, compared to tex, where it's a 1700 -> 394, 4x drop.