As a Baby Boomer, I looked on with bemusement; but Dec. 10, 1974, was a cultural milestone for the oldest members of Generation X. That’s when ABC premiered the Rankin/Bass Productions animated Christmas special “The Year Without A Santa Claus” (a.k.a. “Scary Title, Kids, But Tell Mom and Dad That Hasbro and Mattel Are Still Here for You Even in a Worst-Case Scenario”). Showcasing the voice tale…