[tiew9Vii]

This is a huge (obvious) risk I've seen very little talk/concern on.

It's not even the new one being "less deterministic and often costs more".

Application prompts overfit the model they are using to get the output they want. Switch model, the prompt no longer produces the output you expect and you may not be able to get the output you need anymore.

If a model is critical for your application/business you want the ability to run it yourself otherwise you are stuck when it becomes unavailable.