Competitive markets provide natural death of weak content, without premature euthanasia of strong content. With on-demand streaming, viewers can stop watching if/when a show deteriorates in quality. Some shows have maintained relatively high quality over multiple seasons.
I was taught that lesson during Lost. If I see a show start doing unnecessary romantic/drug/backstory scenes, I’m out.
I wish more content makers advertised that they have the whole story planned before the show starts (like Breaking Bad/Vince Gilligan). Show Horses is a good example of a modern story without much fluff.
AFAIK Andor was supposed to be 5 seasons, and the story for seasons 2-5 was squashed into season 2, because the production was too long, because that's how it goes these days in streaming.
It was indeed originally conceived as 5 seasons, but the creator Tony Gilroy has consistently said shortening it was his decision because the production was too long and taxing:
"We were halfway through shooting season 1, coming through Covid, and the monumental size of the show, the effort, and everything else was just dawning on us. We realized that I didn't have enough calories to do it, and Diego's face couldn't take the timing, because it just takes too long to make it."
"By that point, the work that was required to make the show, at its minimum, was just dazzlingly blinding to look at. And Diego was like ‘Oh my god, we told them we’d do five years.’ Nobody, if we were gonna do it like this, you couldn’t physically do it. It was just impossible."