Please read the article more careful.
The author compares v11 and v10 of the Tesla software.
v10 directly displays the defroster button.
v11 does hide it behind the temperature control (which is criticised).
Their initial reaction was on not being able to find the button after five minutes of driving it, which is what my comment is about.
(Some cars don’t gave have a defogger, in which case one will obvious never find the button. This is unlikely in a current or remotely recent production car…)
All of them except Tesla.