Multiple environments with own Custom Instructions configurations

What about an improvement of Custom Instructions feature to have a number of rooms having own Custom Instructions configurations. This way the same person can switch easily between ChatGPT models with different constraints.

https://chat.openai.com/share/40142c6c-2b34-40d2-88d7-dee81abdb678

Also each room may also have own chat history, so the conversations will be grouped by topic/context.