I mean it depends, I mean there's good shows (90s, Buffy, 00s, Fillmore, 10s, Modern Family) and there's bad shows (90s, Fatdog Mendoza(sp), 00s, X-Factor, 10s, Glee and all their horrible spin-offs and rip-offs.) for every generation (note, I've only been around since the 90s so that's why it starts off there.) and every decade, 30, 40 years from now, nobodies going to remember the bad tv shows, (Keeping Up With The Kardashians, The Soup, X-Factor yada yada yada.) Whereas we are going to recall all the good TV shows (Modern Family, Homefront, The Big Bang Theory.)
As to what once, it now is. For this my retirement tour, let us commence, forevermore, forevermore.