It has already pretty much died, and I don't think it was by the hand of streaming. It was whatever process put a stop to new shows in the template of the really great shows we had in the past. At some point the risk taking stopped and everything just became the same drudge. Of course, there was always plenty of drudge.

It was the comedies that were particularly good and very British. Some were very unusual and bizarre, the late night shows. But they were also where writers and comedians got a break and then became mainstream. I would guess that kind of thing is now made for the internet, and its a shame to see everything go so niche.

An article I came across a couple of years ago (wish I could find it!) talked about how there was this period of time when British TV started to diversify the source of talent, around the 80s and 90s. You got shows like Red Dwarf where the cast were not all from the same small set of drama schools. But it has now reverted and that kind of low budget, take a chance show doesn't get shown on the main channels.