My mom's 2012 Legacy 2.5i dropped a valve guide somewhere in the mid-60k range. A 2.5i, CVT car, that doesn't burn oil and has been kept up to date on service, basically needed an engine before 100k. My point is that car has had a very easy life and is well taken care of.
3 weeks and a grand or so later (Subaru covered part of the repair, could have probably gotten more but jumped at the lower number) and the car was fixed, and hasn't missed a beat.
Just like with my car, and yours, once the issue has been fixed the car goes right back to being the wonderful vehicle you like so much, but some experiences just completely shake your confidence/enthusiasm for a vehicle.
I would be extremely surprised if she ends up in another subaru. If you ignore that time the car lunched the motor (or at least the top end) and was stranded on the side of the highway, it's probably been one of the best cars we've ever owned. If I had to guess, she'll be going back to a toyota product (like AWD Lexus sedan), because her old 2003 camry was troublefree right up until the moment my sister totaled it.