We don't know much about the TC developers, do we? It's also possible that they're just really cavalier about this stuff, and that this is their response to the TC audit process ("stop bothering us about it and use something that's maintained").
On the other hand, as pointed out in other subthreads, if the devs are tired of maintaining it, this could be a legit, unappreciated-developer version of a temper tantrum. Nobody seems to know (yet).
Every version of Windows after XP has a native disk encryption utility. TrueCrypt was built to bring full disk encryption to Windows, which didn't exist at the time - this is the developers way of saying "you don't need us anymore, Windows now does what we did"
I mean, a normal use case is a corporate laptop used when traveling or similar. Normal home users certainly have no need of it, for them it's just something else that can go wrong and destroy all their data.
"Wed, Oct 24, 2013: We have made contact with the TrueCrypt development team. They have stated a commitment to a thorough, independent security audit and cryptanalysis of the code."