Doesn’t sound too insane; sounds like an architecture designed for real-time professing, where you’ve got an “IO processor” that boots the system and handles all the interrupt-heavy work, and an “application processor” that can be solely dedicated to your workload and will only be interrupted by the IO processor if it explicitly asks to be by first making a request to it.

Very similar to previous-gen game consoles, e.g. the Wii U’s “Broadway”