This question already has an answer here:
One's inability to reply to existing answers, due to insufficient reputation, prevents qualified individuals from adding useful updates or corrections to answers.
I don't say this to flatter myself, nor do I have suggestions as to how this limitation might be overcome without introducing adverse side-effects, but Stack Overflow has "missed-out" on a plethora of useful information for this reason.
Once my reputation is sufficient, I will not revisit those questions and add the information that I was prevented from adding when I stumbled upon the questions originally. To do so would be impractical.