I think the golden age is already in the past (the Lost trend, 2004-2010, which finished terrible but in the mean time other great shows with world-wide audience were released) and today is already the after-party that nobody wanted to miss, mostly for the late adopters (which is the majority, anyway). But a lot of people are becoming "series"-averse. I myself included.

What?

Atlanta, Fargo, You're the Worst, Bojack Horseman, Rick and Morty, Kimmy Schmidt, Hannibal, Review, Twin Peaks (The Return), Stranger Things, The Good Place, Santa Clarita.... and probably three dozen other ongoing or started-after-2010-but-now-finished shows I'm forgetting right now that are excellent, by the standards of all TV before 2010. Many others are top-5%-of-TV-series-ever material but kinda skippable now because there's just so damn much excellent TV. I've dropped ongoing shows that are merely very very good because I can do that and still have more TV left than I can watch.

Right now is the best TV's been. It's frustratingly good, almost, because I know there are lots of good things I'm not watching simply because there's no time (I do other stuff too, ya know?).

I think there is a chance that people are getting sick of plodding character driven shows rather than series.

An example, "The Expanse" has interesting characters, but so far it has also been the case that lots of stuff happens in each episode.

Complex series with ongoing storylines can be great but they also get a bit exhausting after a while. There is a definite limit to how many Game of Thrones or Lost plotlines and character backstories one can keep in one's head when you just want to sit down and watch some TV.

It's fine that there are TV shows that are basically crafted for uber-fans who want to carefully watch every episode multiple times but these shows often aren't for the casual viewer. And there's nothing wrong with being a casual viewer.

I disliked Lost and always felt it had a fake (and dishonest) complexity. So many details were introduced, but later forgotten and never resolved.

From the very first episodes, the way they started slowly cycling through each character's backstory, I realised this was going to be a really long drawn-out series that was clearly going to be stretched (and milked) to maximum running length. I'll credit it for it's glossy production look and design. That's one thing that really separates productions today from old: many TV series have the same glossy, high-end look of Hollywood films.

I loved lost and hate it in hindsight. Fake/dishonest complexity is a great description of what was wrong with it, I just didn't realize that was the case until halfway through the final season.

We are in a new era of netflicks shows like stranger things, sense8, the 100, etc. Someone will look back and say its the golden age of tv for them

I think you can argue that the golden age died with breaking bad and mad men ending. But we are still in a silver age. There has never been more good TV. But we lack truly great consensus shows.

Probably because the talent pool is diluted. There are probably 10X as many serious cable/streaming dramas now than there were 10 years ago.