The first thing to notice is that all the comics featured are men.  All but one are white.  All are (or at least pretend to be) working class.  Many are obese.  And all would find it very difficult to get on to television in the 21st century (with the notable and curious exception of more modern 'favourites' like Jim Davison).

Political correctness is much maligned these days, but has won the battle by and large.  The main point of these comics was usually sexist jokes ('take my mother-in-law...') as the more racist material couldn't get shown even in the 1970s.  But the 'Women's Lib' movement, as it was called, plus the social and economic liberation for women that part-time work and the ending of heavy industry in the UK brought, had made such comics - and programmes of this sort - impossible to show on mainstream television by the 1990s.