As per title, I don't get why did Sencha choose ant as build tool in the latest Sencha Cmd tool. Ant is Java-based and requires xml config files, while using grunt, which is Javascript based and would use JSON config files, resulting more consistent with the other app configuration files.
Moreover, you Sencha guys are JS geniuses: you could exploit that building environment at its top!
Wouldn't it be nice for the next build tool releases?