>As far as I can see, nobody was actually able to use Swype, apart from people who got a Samsung phone with it preinstalled.Swype Beta has been available since 2010 and could be installed on anything as far as I know. It required signing up via email and downloading an APK though. I'm not sure why they didn't publicize it more.
>How come people are still talking about Swype?
In my opinion, it's far superior to the native Android implementation and Swiftkey.
Swiftkey Flow is a bit more responsive than Swype and I switched to it for a while to see if it could unseat Swype as my prime keyboard, but I eventually found major problems with its accuracy and predictions. I should have kept a list, there were certain words that proved impossible to enter to matter how precise the input. I also found that it occasionally (often enough to be irritating) refused to function as a "swipable" keyboard.
The Android keyboard is pretty bare bones relative to both Swiftkey Flow and Swype.
Both the Android keyboard and Swiftkey were lacking some very useful shortcuts present Swype for launching a numberic keypad, capitalization and text selection/manipulation.