I have one fic that I stopped writing until the hurt dissipated enough (this was about specific character deaths) and I keep saying I'll go back to it, got as far as posting the first three chapters to AO3...and yes, it remains unfinished. Sun is still stuck in 1977 with a shot Ben Linus to treat. One day I will get there...Having said that, I have done some other ending rewrites on that one. (A lot involving my OTP Sayid/Desmond).