My wife has a android s8+ and she used to be able to send a reply to text by speaking. Since getting the 2018 Hybrid, it says you get a text, do you want to reply? You can voice a reply or text a generic response. The voice reply opens to the generic text response. In the 2017 gas model, you could say "I'm on my way home" and it'll type out "i'm on my way home"
Prior to reaching the first year mark and losing some of the Uconnect "free" features, my wife could type in and send addresses from the passenger seat via her cellphone and the UConnect app. Nice feature but not for the price to continue.