Not sure if you've used Bing Chat recently. It's performing worse and worse over time. One pattern that I keep running into in almost every conversation is that it doesn't acknowledge the question and just answers something else. When I clarify myself and ask for a better answer it starts repeating itself verbatim, again and again, and there's no way to get it out of this.

Additionally Bing Chat has a limit of messages per chat, which means you lose your context over and over again, which is a significant impediment when context is important to the problem at hand.

Another problem is Bing Chat is much more likely to search online, than ChatGPT 4. ChatGPT searches when this is logically necessary, like asking for latest news. Bing almost always searches, and then IGNORES its own knowledge, in order to give out a poor digest of what it read online. The problem is that what it read online is often not relevant to the question, because it depends on how accurate the search query was. And if I wanted just to read the search query I'd go search myself.