The leakage wouldn't be from training, but from other uses of Personal Data. As far as I understand it, users can opt out from the training aspect, but they ca

The leakage wouldn't be from training, but from other uses of Personal Data. As far as I understand it, users can opt out from the training aspect, but they cannot stop their conversations (“User Content”) being used “[t]o improve and develop our Services and conduct research, for example to develop new features”.