I appreciate your response, but I think also you are misrepresenting the events here. If the developers simply moved on that would be one thing, but what actually happened is they also made this claim:
Using TrueCrypt is not secure as it may contain unfixed security issues.
I don't think the developers owe anyone anything, in terms of supporting this project or even justifying their decision not to support it. But they did make this claim, which they didn't need to, which casts the entire project in doubt. You're saying they are refusing to elaborate on this claim? Or has no-one asked them to? Because I think this thread is evidence enough that plenty of people want to know.