Even then, I would not trust an AI lab as Microsoft does have a long history of support for word whereas I’m not sure the level of continued support from AI labs. *support including bug fixes, vulnerabilities, continued user testing, interop with other services, standards, etc

Right now even OpenAI has its own copy of Overleaf (for latex). I’m not in the same circles as it’s intended users, though I haven’t heard any major use of it since the splash.