IPX ruled the roost, very popularly, for a little while. How long did it take to die?
It isn't dead yet, but it's certainly on the endangered list.
Why did it die?
The death of Novell NetWare (and their transitioned to IP) killed it the enterprise. Games adopting IP for network play killed it in the home.
Ultimately, it sucks as a WAN protocol, so the internet was built using this new fangled IP thing.
