Hipjot(new)/ Swype - why wont microsoft let us have this?

[Fry3000]

New iOS Swiping Keyboard Capable of 120WPM Speeds - Mac Rumors

Its an great functionality and its been on Android for some time. Why can?t we have this on Windows phone?

video

 

[Flagz]

ẃe don't support custom keyboards, that's one of my gripes, I really wish we did support them...

 

[palandri]

Keyboards modifications aren't included in the SDK (software development kit).