That was the interesting question asked in Ivan Hewett's article Béla Bartók: modern music’s invisible man in the Telegraph the other day.
I'm not sure who is neglecting him, but I don't think I'm one of them, having got all of his works at least once, and some things - the string quartets, for example - several times.
So, does anyone here think Bartók is neglected?
Are you 'guilty' of neglecting him? :-)
"Louder! Louder! I can still hear the singers!"
- Richard Strauss to the orchestra, at a rehearsal.