Microsoft made its Bing GPT-4 chatbot available to everyone in early May. No more waiting lists, just log in to the new Bing or Edge with a Microsoft account, and now you can access the open preview version powered by GPT-4. Microsoft is also upgrading Bing Chat on a large scale, adding many new features and even supporting plug-ins. 　　One of the most requested features from Bing Chat users is saving previous chats. The feature, which Microsoft says will be available “soon,” will allow users to stop a chat in the middle and pick up where it left off again. Microsoft will also add ways to quickly export chat conversations…