The WhisperPush feature had some major issues. It really does seem like it could have been a support nightmare, especially considering how easy it is to just do

The WhisperPush feature had some major issues. It really does seem like it could have been a support nightmare, especially considering how easy it is to just download TextSecure/Signal. Registering my device with WhisperPush in the past created a conflict with installing TextSecure, even after opting out of WhisperPush. The only way to switch to TextSecure was to manually unregister my phone number through the terminal with a curl command I found on a github issue page. That isn't something that is ready to be preinstalled on the general public's devices.