Why was this down-voted? He is right, bitlocker is available only for some versions. Plus, there is no way to know whether bitlocker is better or worst and there is no way to audit it.
I didn't downvote, but saying the developer doesn't know what he's talking about and that his reasons for deciding to stop working on a project are flawed are each likely to be downvote magnets.
I may refer to this thread the next time someone asks "why don't companies give explanations to candidates they don't hire?" The answer is that the candidates feel compelled to prove that the company's reasons are flawed. Look how they react to someone deciding to stop working on a project.