Because these computers have interchangeable CPU modules, you can indeed have a fully-open-source hardware stack on your MNT Reform. Before you go shitting on people who are trying to do something they believe in (and doing a good job of it), do some research and make informed judgements/comments.
The RKX7 CPU module is completely open source firmware, and the LS1028A CPU module is also completely open source if you're not using the eDP display (i.e. in a rack/headless configuration).
https://mntre.com/modularity.html#our-cpu-modules
The RKX7 CPU module is completely open source firmware, and the LS1028A CPU module is also completely open source if you're not using the eDP display (i.e. in a rack/headless configuration).