I think I have. But here goes again.
Without it 5e will be at a disadvantage. Many folks will look at the lack of 5e being able to 'live' past it's support from WotC as a mark against it. Their competitor will have an advantage over 5e from day one.
Okay, that makes sense. I don't think it's a very big advantage--after all, people are still playing AD&D today--but I concede that that is an advantage.