As San Francisco’s PBS affiliate, KQED, celebrates its 50th birthday, Tim Goodman has decided that its time for PBS supporters to face the obvious fact that the network and its affiliates are visionless blobs on the cultural landscape, fulfilling no mission and serving no real viewership. “This is essentially what PBS is now: A channel for people who don’t get cable. There’s a reason PBS’ viewing audience is moving beyond age 55 — much of the core audience, loyal to a fault, believes PBS is the only alternative to dumb or bad network television series. But these are people using 8-track tapes in a CD world.”