AC97 
"[@Dustcan":](/pony/season-9-discussion-thread-warning-spoilers/post/4490916#post_4490916
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Okay, so if you wanted to take a bit from the book, you could say Star Swirl got locked to say, being middle aged with white-hair from the exertion, and trying to make himself go younger than that wouldn't work. Or something. Maybe that's a bad take, you be the judge.
In any case, the PoS said he was slightly more powerful than Twilight ("Argh! This one is almost as... strong as you, Star Swirl."), as of the S7 finale, so he's still_*strong._
*
Okay, so if you wanted to take a bit from the book, you could say Star Swirl got locked to say, being middle aged with white-hair from the exertion, and trying to make himself go younger than that wouldn't work. Or something. Maybe that's a bad take, you be the judge.
In any case, the PoS said he was slightly more powerful than Twilight ("Argh! This one is almost as... strong as you, Star Swirl."), as of the S7 finale, so he's still