On the contrary, I've had a USB cable last multiple phones before. I think the trick is to avoid using it when it's plugged in as much as possible. Another common pitfall is that microfiber (pocket lint) can build up in the charging port over months and years, resulting in a poor connection. You can usually remove this by turning the phone off and using the tip of a wooden toothpick to gently scrape out the lint.
I definitely think they should include a cable in the box though.
From the article:
So they were working backwards to determine the inputs based off of the observed eye motion.
I have a much less modern VR headset and you can definitely still type on a regular keyboard while you're wearing it. You can't see the keyboard though, so you need to be skilled enough to touch type. I can't find any reliable-looking statistics on it with a quick search, but it seems like that is not a very common skill