It's "experimental", which means that it is not fully released. In particular, the "experimental" tag means that it is subject to a different privacy policy and

It's "experimental", which means that it is not fully released. In particular, the "experimental" tag means that it is subject to a different privacy policy and that they reserve the right to train on your prompts. 2.0 Pro is also still "experimental" so I agree with GP that it's pretty odd that they are "releasing" the next version despite never having gotten to fully releasing the previous version.