[user104658]

Originally Posted by Marsh.

Yeah. We've yet to have her meet a Doctor she didn't recognise.

She didn't recognise Capaldi! That was like... The plot of the whole episode. She thought he was some random human doctor and even "stole" the TARDIS with him, letting slip that she "does it all the time and he never knows". Also gives that big speech about him not realising he's stood right next to her (then realises).

Your memory is terrible sir!

I don't think she had ever seen Tennant before her first episode either, as in theory that episode would follow the final time she saw Capaldi, and she had otherwise only seen Smith. She did realise who he was straight away that time, but at first thought he was an older (than Capaldi) Doctor before realising "how young" he was (the youngest she had ever seen him). And she "died" in that episode, so their first/last meeting.

However she is still alive with her consciousness stored in the Library, so it's feasible that they could devise a way to bring her back into a physical body at some point.