MS is trying to make me use Edge Browser by randomly refusing to let me use Bing chat in any other browser. This makes me think that MS is still evil and will force me to do things the moment they can. I gave up Bing Chat because of this and was using Perplexity.ai instead, until Bing got integrated into ChatGPT.
Another thing is the feel of the MS products is very different than OpenAI. For example, Bing chat again, would have a strange UX where it counts down my message allowance on the topic as I keep asking follow up questions as if it was designed for their convenience and not mine. OpenAI products on the other hand feel much more pleasant to use and don't stress me out even when things don't work as expected, which makes me think that the approach of product design is very different than MS.
Same tech running on the Azure servers, completely different product experiences. IMHO this points to completely different mindsets.