In short term, anything could happen. But in long run, everything will depend upon the project's progress.
Proper communication towards the community, steady growth of the company in employees, scheduled execution of the roadmap will prove the projects worth
Nobody will ever know what can happen in time. But let's not forget it's a project the world needs. Even if it is a long-term one, I think health matters the most. I do not think he will have any impediment in doing it. Such projects have always been successful. Of course, it's hard work to do. The world will have to be informed about its evolution and all stages of the Roadmap will have to be respected at the set time.