I think it's different than other Slayers. Other Slayers were killed; she chose to sacrifice her life as a gift to humanity. That's the point; that's always been the point of the series: with great power comes the necessity to choose responsibility over self-interest.I’ve always hated the idea of this episode being the series finale. It’s a better episode than Chosen I think but I hate the idea that Buffy dies at 20 and would end up like any other slayer that she was trying to research in Fool for Love ‘big battles, great protector blah blah oops she’s dead. The journals just stop’ when the show has always been about how different Buffy is to any other slayer before her
"Not a good choice, but you have a choice!"