It's the best advice in order to see any update.
There are plenty of programs that do some unique things very well, but fail on doing "everything that the mature alternatives do", so they fail to ever get mainstream traction themselves.
People want a complete solution that ALSO does X unique thing, if they are to drop their existing editors. Not something that they'll have to use alongside them for that special case.
(Joel on Software has written some nice posts about this idea, and why "minimal" competitors, who don't do "everything that the mature alternatives do" frequently fail, though I can't find the link right now)