Honestly, if there's no device that can read SPI in 100 years, then not having access to your digital artifacts is probably not a big concern... I would say th

Honestly, if there's no device that can read SPI in 100 years, then not having access to your digital artifacts is probably not a big concern... I would say that an e-ink display might last that long, and you could build a system with a microcontroller and a pretty adaptable power source. It could connect to a keyboard, or you could use a few buttons for a browsable interface. As long as nothing corrodes too badly. And you would want to inspect it for tin whiskers using a microscope or loupe before starting it up.