gokrazy is a very cool project and something I'd like to see more of. It's not a unikernel per se but it shares the idea of packaging your code and the OS together and shipping it as one. My dream would be a pure Go userspace library to do absolutely anything related to system management you'd need, like managing networking, connecting to Wi-Fi access points, performing upgrades and so on. But it's such a massive undertaking so we're stuck depending on software written in C via FFI or exec'ing shell commands -- pretty gross.