It's definitely not impossible. I think the increase competition they've begun to face over the last year is helping as a deterrent. If people notice GPT 4 sucks now and they can get Claude 3.5 Sonnet for the same price, they'll move. If the user doesn't care enough to move, they weren't going to upgrade anyway.
Also depends on the friction to move. I admittedly have not really started using AI in my work, so I don't know. Is it easy to replace GPT with Claude or do I have to reconfigure a bunch of integration and learn new usage?
It depends on the tool you use and I guess the use case too. Some are language model agnostic like aider in the command line, I use sonnit sometimes and then 4o other times. I wonder if or when language models will become highly differentiable. Right now I see them more like a commodity that are relatively interchangeable but that is shifting slightly with other features as they battle to become platforms
