But at least in my car I only need to select fan speed in the first menu then scroll do actually change it. This in a model x. But I was really responding to the "100% touch screen" statement.
In contrast, IIRC a 2007 Prius could do this type of voice command with no obvious difficulty.
The only bug I've found so far was when I said "open driver door" and it displayed "opening trunk" and it slammed it into my garage door!
...if you are from English-speaking country or you know English.
Does Tesla understand every language in the world?
Or: how would my father change settings in Tesla? Would he need to learn one English phrase ("Tesla/Alexa/Siri/Whatever, open Google translate"), then speak in his native language, then somehow speak the translated text to Tesla's system?
Currently in his car, he does that by pressing a button. Done.