Maybe she means Medtner belongs to the group of things she's unfamiliar with.
To me, he's easy to develop an appreciation for but there's always a lack of familiarity since he wrote a lot and anything that you commit to familiarizing yourself with occupies time due to the complexity of the process (or length, maybe).
There are some people at this forum who like to quote random parts of comments, mix them together to admire themselves...
I discovered Medtner recently and I really want to learn his works. Even these which sound easy, are quite complex, especially maintaining proper pulse is hard for me.
What's wrong with the Schumann sonatas? Does the g minor have a personality disorder that's only evident once having been learned?
The f sharp minor is an incredible composition. Never looked at the score, wonder if it's difficult to play.
I find the g minor Sonata quite boring... Schumann like to repeat some motives with only little differences, which for me doesn't make any sense. Harmonies are sometimes strange in my opinion. Melodies looks like they are forced. Maybe I'll understand it when I grow up.
I can't say anything about f# sonata, because I heard it only twice. Maybe it's better, maybe not. For now I'm done with Schumann.