Personally i think it would be worth it to experience it before it dies; it is part of a franchise that I enjoy and one of my tech podcasts just had an offtopic episode where they talked about how much they liked it as a game, and whether or not it would die and what that says about the games industry.
I know I don't have to play it. But i have extra hdds lying around, and the price is affordable especially on sale, so why not?
I mostly want to play it solo/single player anyway; i don't really care for pvp.