Honestly, who cares if nobody plays it or not. Don't wait for a famous pianist to perform it first. All too often a great piece remains overlooked or undiscovered in a pile of music, until a Horowitz comes along. Then voila - everybody wants to play it, just like Scriabin's music. Elegie is a is a deeply personal and beautiful piece of music. It was one of my favorite pieces to play in high school.
It's a nostalgic piece, perhaps a form of sadness that is too mystical or painful for some to comprehend?... Perhaps, pianists consider it as an early work or too cliche like the Prelude in C-sharp Minor? In no way, however, does it diminish it's grandeur. If played amazingly well, it can sound as exiting as if you were hearing it for the first time... Who knows why it's not played too often.
But, what is known is that he wrote it in 1892 when he was 19, essentially a conservatory student. The publisher grouped this piece in an unrelated group of pieces, Morceux de Fantasie, Op. 3, but it's not intended to be performed as a set. He dedicated it to the memory of his dear colleague Anton Arensky... Well, now that Horowitz is gone too, perhaps Elegie deserves a re-dedication to Horowitz as he and Rachmaninov shared a deep, life-long friendship...
Just learn it!
"Nobility of spirit has more to do with simplicity than ostentation, wisdom rather than wealth, commitment rather than ambition." ~Riccardo Muti