We've had fairly robust speech to text for a few years now and the only places its seen real penetration in is basic personal assistant stuff involving short and simple queries, so I find it hard to imagine that anyone thinks that speech can replace keyboards as an input method.
Even with people I know who've tried to switch to using speech to text due to injuries, it's been a nightmare because there are no easy ways to use it for anything that isn't plain format-less dictionary language. For casual communication it sucks because people use a lot of slang, often even slang exclusive to their friend group, and for serious communication it doesn't work because "delete last word" or "cut sentence X and paste here" is objectively not as convenient/fast for say, the average western highschool student as doing the same via keyboard.
Not even considering how unrealistic it is to edit/format text via speech.
As a way to reason about this, look at some code (assuming you're a programmer) and try to think of how you would input it without a keyboard.
The only place it works is if you have your own private office (e.g. doctors dictating their notes), or at home.
Ah yeah I hate it when I go to the supermarket and get asked interview questions like "convert that number to binary". Such a useful skill to have for the general population
Just because something is relevant to the HN readership doesn't mean that it is to everyone.