I guess I tend to think about these things ("can there still be a novel in the age of the web?!") in terms of ecological niches, and what things provide that other media don't. Visual arts are in a real crisis now cuz photography set somethin off a century ago, and books are in a similar place with movies and TV. If you want immersive narrative form—traditionally the bread and butter of novels—a screen's an easier, smoother experience.
But I think the one things novels can still do that no other medium can touch yet is something like "psychic occupation"—the ability to get inside a consciousness. That's why in my mind it's no surprise authors like Knausgaard and Ben Lerner and Maggie Nelson are such constant presences.
I think people also still get something out of the "19th C social novel, updated" mode that Franzen made so much cash off in the 2000s, and that contemporary writers like that Irish woman, Sally whatsherface with the netflix special, get into. But it's a bit like dressing up in old timey clothing with your friends and getting some social gossip. Actually, come to think of it, books like Freedom or Normal People might be high enough in social information that they're in a league of their own, w/r/t say a television series doing similar... I'll have to think that thru