but the Linux they are shipping underneath that FreeDOS also works. And they also offer Linux preinstalled, so they need to "support" that to whatever amount anyways.
They probably only support the FreeDOS, not the underlying distribution. If you mess with the Linux and break the FreeDOS, that's on you. They might have 2 customers running some 40 year old legacy DOS app but 99% of people selecting the FreeDOS option are wiping it to install something else, so using it unsupported.
The pre-installed Linux works, but it doesn't have to work for all the driver and functionality edge cases that a real FreeDOS machine would definitely not support.
