Perhaps even talking just about where quality drama ends up is changing now. If you're ABC and someone comes to you with a procedural that could be pretty popular, do you actually think long and hard about whether to air it on ABC or make it a Disney+/FX original? There is still juice to be squeezed from network TV of course, and the likes of Dick Wolf does very well from it.
But I guess that today "The Americans" would end up on the streaming bit of FX rather than the linear bit. "Homeland" I'm not so sure wouldn't still be on Showtime. The fact that Paramount is still holding onto Showtime as something separate and distinct from Paramount+, and is still programming it separately probably says more about the management of the company than anything. I'm sure premium cable channels still earn good money from older viewers who happily pay for them even as they're not totally sure where they can get HBO Max or whatever, so you have to keep a level of programming up. But otherwise I'm not sure.
I'm unclear about AMC's longer term. It feels like they've been left behind a bit, rinsing things like The Walking Dead for everything it's got, and letting things like Killing Eve run slightly too long. I know they have interesting and smart niches like Shudder, but Breaking Bad probably wouldn't make it to AMC today.
Netflix is leaning heavily into trashy reality, I suspect in large part because it's cheap. But also viewers like it. And I believe that over time, shows from Discovery that filled that gap, were pulled back by Discovery so they had to commission lots to fill a hole. It does mean that where once I opened Netflix and saw a lot of premium fare on the tiles, today I see a lot of trash, with bits and pieces of better stuff hidden within. At the moment, Netflix still commissions and produces programming at such a rate that I don't have to think twice about stumping up the extra money when they up my subscription. But that could change in time.
I think Apple, on the other hand, is trying hard to be HBO for the 21st century. Everything they make has a sheen of quality - even when it's not actually very good. They steer clear of some areas that HBO would have leant into - no sex or nudity. But otherwise, they're turning out shows at a slower pace and you might at least check out everything they're doing. (I am very much enjoying Slow Horses based on a series of novels, a couple of which I've read). But then the actual rationale for Apple TV is complicated. My suspicion - which I've heard others say - is that when Apple reports massive "Services" revenues, they can put up slides showing Jennifer Aniston or Jason Sudeikis to suggest that it's their premium TV offering, when in fact, it's millions of people paying in-game for Candy Crush or whatever. That's not as sexy, but that's what really drives that revenue. Plus Tim Cooke gets to go to the Oscars and needle Reed Hastings when he comes away with Best Picture :-)