  We review recent results on twisted noncommutative quantum field theory by
embedding it into a general framework for the quantization of systems with a
twisted symmetry. We discuss commutation relations in this setting and show
that the twisted structure is so rigid that it is hard to derive any
predictions, unless one gives up general principles of quantum theory. It is
also shown that the twisted structure is not responsible for the presence or
absence of UV/IR-mixing, as claimed in the literature.
