For people that use ChatGPT the same way you do, yeah it's not. For people in the throes of AI psychosis who've named their ChatGPT and have a deep relationship with it, switching to a newer model from OpenAI is an issue, nevermind switching to a different model from a different company.
Most people dont give a hoot about that, they have much more interesting stuff going on in life.
I considered that but I don't see it being very impactful. It presumes a user who cares enough about "their" ChatGPT that they can't move from a particular model provider, but simultaneously does not care enough that model providers themselves have a financial motivation to shoo users onto their newer and more efficient models.
The transition from GPT4 to GPT5 was not well recieved among this crowd -- nevermind that I think this crowd is pretty small (comparatively) to begin with. I just don't imagine you can build a business on that sliver of a sliver, much less one that justifies OpenAI's spending.