This is a Good Example of when being able to see who is Viewing a Thread can be Helpful. When you Ask a Question.
If you can see that the Person you Ask is still in the Thread, then you feel like OK... I'm pretty sure they saw My Question.
But if you Can't See who is in a thread, then you Don't Know if they saw it? Or if they Did and are probably Blowing You Off? Or if they Did and are coming up with so Killer Answer? Or something else?
She'll see when she comes back online tho.
Never know when someone logs off the second you are typing something.
I have also found that the online indicator does not go off instantly when someone logs off (same as before).