Keyboard Shortcut to Add Block

If I have a code block immediately followed by a query, there's no way to insert a text block between the two. A simple fix could be to copy what some text editors like Notion do and have three newlines in a row exit the code block and insert a new text block beneath it.

In a similar vein, I would expect hitting backspace in an empty code block to remove the code block entirely. As it currently stands, there doesn't appear to be a way to delete code blocks without using the mouse to click-and-drag select them.