[Void_]

Question: Is it necessary to use "they" now that it's clear that she's a girl?

I thought you use "they" when gender is not clear as to avoid assuming it's a guy.

[sjburt]

I sometimes use "they" when I feel like using a gendered pronoun would distract from the topic at hand. It's incorrect but sometimes it makes sense.

[rising-sky]

Comment for people downvoting this: I don't think this comment should be downvoted, seems like a genuine question, intent on learning or understanding. If anything it's an opportunity for people or the questionee to explain or teach why they are using a specific pronoun. It's always better to approach with reasonable doubt and be less dismissive

[lsh]

so common it's normal in Australia, I wouldn't worry about it.