Personally it was when I stopped owning a television, but tbh I kinda miss it, allot of stuff I watched warms my heart when I think of it such as:
my parents are aliens, hey arnold!, the clangers, trap door, aquilla, grange hill and many others.
I remember all of those. Digital TV has killed off a lot of the better stuff, but to be honest, it was also rubbish before digital came along.
Spatz, Pottsworth and Co, Grange Hill, The Lowdown, The Finder, Simon and the Witch, Happy Families, The Riddlers... etc.. ring any bells?