After reading a Facebook post by Kaj Sotala about MessagEase I switched to the keyboard because it's much better one than the default Android keyboard I was using the default keyboard.

It allows faster typing. It allows typing beautiful unicode that's hard to type even on a PC. It has macros that allow me to save commonly typed string such as facebook birthday greetings and my email address. It has easy gestures for going to the top or the buttom of a document. You have a copy-paste history.

I still use the default App launcher. Does somebody have a case why I should use a specific different launcher?