I wonder if there's some element of face-saving here to avoid a lawsuit that may come from someone that uses the model to perform negative actions. In general I've found that gpt3.5-turbo is better than text-davinci-003 in most cases, but I agree, it's quite sad that they're getting rid of the unaligned/censored model.
More likely hardware constraints. They can't get the hardware fast enough to do everything they want to do. So, they free up resources by ditching lower demand models.
