[Mizoguchi]

Thin wrappers around ChatGPT may be ok to start.

There's no point on creating your own GPT before validating your idea and getting some traction.

Amazon didn't build their logistics and freight division first to then start selling books.

Once your product or service is off the ground and more resources are available then you can start moving away from OpenAI.

This could be much simpler that you think, particularly if you designed your systems with this in mind and considering future costs of training LLMs will be a fraction of what they are today.