You could look at it as the chat requests being the API, which is simple yes, but in a way the prompts you would write could also be considered the API, in whic

You could look at it as the chat requests being the API, which is simple yes, but in a way the prompts you would write could also be considered the API, in which case it is the most complex API ever. People aren't worried about having to change the first one, it's the prompting needing to change/ model not having the right capabilities.