Voice inputs are quite hard to get right and they have been working on them for quite some time now (multiple years). As of right now, traditional input methods are still preferred as most efficient but this also depends on the environment restrictions as well. In a car, voice input is good as it promotes hands free operation. As the likes of Amazon Alexa, Google Assistant and Siri become better over time, so will natural input.
That being said, natural input is okay but not yet good enough to match up to the effectiveness of traditional.
