For chat apps, once you've got the conversation thread open, typing is pretty easy.
I think the more surprising thing is that people don't use voice to access deeply nested features, like adding items to calendars etc which would otherwise take a lot of fiddly app navigation.
I think the main reason we don't have that is because Apple's Siri is so useless that it has singlehandedly held back this entire flow, and there's no way for anyone else to get a foothold in smartphone market.
I think the more surprising thing is that people don't use voice to access deeply nested features, like adding items to calendars etc which would otherwise take a lot of fiddly app navigation.
I think the main reason we don't have that is because Apple's Siri is so useless that it has singlehandedly held back this entire flow, and there's no way for anyone else to get a foothold in smartphone market.