Presumably the android keyboard market is quite a mature one to enter. People are either stuck in their ways and use the same keyboard they always have or just use the stock samsung / google one that comes with the phone. Plus, having to tediously type a reply to someone when learning the new layout seems like a quick way for someone to uninstall the app...
I do like the swipe to edit / delete feature though.
I do like the swipe to edit / delete feature though.