I read the link in the article, so I'll just paste what it says:
* High Performance Computing - Act as the base OS for a HPC cluster node. Running advanced computation workloads is ideal for a mono-tasking Operating System.
* Embedded Applications - Provide a platform for embedded applications running on commodity x86-64 hardware.
* Education - Provide an environment for learning and experimenting with programming in x86-64 Assembly as well as Operating System fundamentals.
For the first use, it seems like it'd be nice if there were some way it could reuse existing hardware-compatibility work done on projects like the Linux kernel or the BSD kernels. Even if you want a single-tasking system with little in the way of OS services, you still usually don't want to be debugging the quirks of every hardware device, or writing your own driver every time you get a machine with a new SATA controller or NIC.
* High Performance Computing - Act as the base OS for a HPC cluster node. Running advanced computation workloads is ideal for a mono-tasking Operating System.
* Embedded Applications - Provide a platform for embedded applications running on commodity x86-64 hardware.
* Education - Provide an environment for learning and experimenting with programming in x86-64 Assembly as well as Operating System fundamentals.