But apart from educational purposes, why would you do that? Sure, the graphics driver is an ugly blob, but if you care that much about libre hardware/software,

But apart from educational purposes, why would you do that? Sure, the graphics driver is an ugly blob, but if you care that much about libre hardware/software, it would be odd buying an Raspberry Pi in the first place. Granted, "for educational reasons" is a valid subject for the Pi. Get that old Abrash book out and let the OpenGL-spoiled kids feel the pain.