My guess is that there are still writers who have the ability to write the scripts liken to the 60's and 70's era. The trouble is that now in the day and age of the epidemic called Political Correctness, and I emphasise epidemic because it is a form of disease of the mind, these writers scripts would never be accepted.
Minority anachist ethnic and political groups have hijacked and are manipulating the very thing that has made this country so tolerant over the centuries and that is the freedom of speech.
I noticed the other night watching an old recording of Please Sir on Britbox at the start of the episode was a disclaimer saying that they apologise for the content of the programme as it was made during an era when values were not the same as today.
We are really the ones to blame for all of this. We have allowed these people to get into positions of power which has led to the irreversible changes to our very way of life.