Please count me out. I'm a non-native English speaker, with a strong accent, and I'd absolutely prefer voice control over having to:
1) Remove my right hand from the steering wheel, reaching forward where the controls are. There is a good reason all important controls (besides pedals) are on the steering column. 2) Either a) moving my eyes away from the road for a moment, looking for the knob; or b) trying to find the exact controls by touch and memory.
> an infuriating experience to try to make the bloody machine correctly interpret what you're saying
Machines are limited - and despite marketers wanting us to believe otherwise, I don't expect them to display comprehension natural human languages better than my cat does. Like I query search engines with keywords and special syntax, and not proper sentences, I expect to communicate with the machine in a special, non-natural language.
Restricted speech recognition with strict grammar and limited vocabulary works quite OK those days. It's the general-purpose voice recognition and "smart" assistants are things that suck hard.
Heck, maybe I'm a total weirdo, but I'd rather learn a special conlang than reach for AC controls by touch.
For the rest of the population of this planet, voice controls are horrible; either the user doesn't speak the supported languages at all, or speaking the supported language doesn't come naturally and switching to it requires mental effort, or it's an infuriating experience to try to make the bloody machine correctly interpret what you're saying.
That's even ignoring the complete fucking shit show that is software trying to understand natural language and infer meaning, without just turning it into a tedious form of a command line interface.