There were a lot of things involved there that really have no connection with now or the future. KRTH was KHJ-FM until 1972...Bill Drake, who made KHJ a legend with "Boss Radio", was hired to consult KRTH in 1992, and he hired his former KHJ stars, Robert W. Morgan, The Real Don Steele and Humble Harve for KRTH. 24 years ago, those moves tapped a vein of nostalgia among 40-somethings. Today, KRTH has found a way to be successful playing non-current music without formatic or human ties to the past. It's reasonable to assume they'll continue.
To put it in perspective, we of a certain age look back nostalgically at KHJ - Drake hired RWM and RDS on the air for nostalgia purposes (and also, I'm sure - their talent) in 1992 - that was almost a quarter century ago. KHJ's glory days were a couple of decades before that.
If you'd asked me when I was...say 22...in 1974 to relate to music or radio personalities in 1952 or 1932, I would have been clueless. I guess I would have recalled that Joe Yoakam was probably an announcer on KFWB in 1952, but that would have been the extent of my knowledge.