It was totally ahead of it's time. I remember when I last watched the whole series, about ten years ago in the wake of the Iraq war, I thought a lot of the backstory seemed
relevant. And that was ten years after it first went on air!
I think it's because, whereas most other Star Trek shows invite the viewer to take on board difficult subjects via some kind of an allegory, DS9 was never afraid to just say things the way they really are, no subtext required: sometimes shit happens, and you just have to deal with it the best way you can.
I don't think the show ever lost Star Trek's fundamental optimism, but on the other hand it was by the far the Trek series which most represented anything resembling a gritty reality. That was built into the format way back at conception, and it only got strengthened as the show went on.
On a side note, watching the TNG season six blu ray the other day, I was thinking about Worf. That guy was a mainstay of TNG for seven seasons, but was always just the guy that fired phasers and got caught up in (mostly isolated) Klingon intrigue subplots. On DS9, he got more actual
character development in four seasons than he did in his seven years over on TNG. I think that's down to the very different format of the series.
Everyone got character development, whereas on TNG almost everybody was static, operating only within certain parameters (and was carefully maintained that way).
So yeah. I guess my point is, DS9 had a solid series format from day one. And that's why it holds up so well today. You can't bluff that kind of thing, a show has either got it or it doesn't. And DS9 definitely had 'It'.
