speaking as someone who read it as a youngish teenager during the 60s, it was a huge deal. I can understand how it may be highly dated now, but it was actually a major influence on my way of thinking, and some things remain today (for instance, I find that, not altogether consciously, I try to be a Fair Witness). And I still find it meaningful when I re-read it.

Thinking it's important is probably a generational thing, but still, I don't think that there's any reason to say "In retrospect, what the hell were we thinking?" We were thinking that this is a book that explores, whether we agree with it or not, a great many of the things that we are thinking about and questioning in society. And I don't think that was something we should be retracting, even though it may no longer be relevant to think about some of those things today.