I definitely think the webcam industry and social media pulls a lot of talent away from the porn industry. More money and more validation for less work and fewer strangers you have to fuck.
But I think you can't discount the fact that the internet has desensitized us by showing us tens of thousands of beautiful women's faces. A decade of that is going to change the way a man gauges any new face he sees. And with internet porn you've seen so many different women so fast you've already made a lot of your best porn memories early on. So like with music, as you get older you spend more time revisiting and rediscovering old favorites than seeking out the new stuff with the same passion and open-mindedness you had when you first started.