One of the goals of Project Oberon is a system that can be understood in its entirety by a single individual. A USB controller, or an HDMI encoder would take several books to describe.
There are hundreds of FPGA boards that do not meet the requirements of Project Oberon, in addition to the board you mention.
There are hundreds of FPGA boards that do not meet the requirements of Project Oberon, in addition to the board you mention.