The article seems a bit misinformed. All of the UEFI systems I have encountered have native UEFI firmware in flash. On top of the UEFI environment, most shipp

The article seems a bit misinformed. All of the UEFI systems I have encountered have native UEFI firmware in flash. On top of the UEFI environment, most shipping systems have a compatibility layer (CSM) that exposes a legacy BIOS emulation to allow traditional MBR-style booting. It is possible to load an EFI environment on top of a legacy BIOS (UEFI DUET), but that isn't usually how it is done. There is no special bootloader; OS bootloaders are just UEFI applications in a specially-named path on each drive that the firmware finds and lists as boot options. The mouse-driven GUI is a feature of some specific implementations, not part of UEFI itself.