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Yeah, this seems pretty terrible compared to a modified memtrest that reports results.

Over network? Needs a networking stack in memtest.

Over serial? Physical serial is rare. SOL would work, but since it is connection-based you can't poll it.

This seems like a simple and reliable method to me.

Since they take a screenshot of the console they could output a qr code and read that.

Patching the font colours are probably a few lines of diff, adding a QR code to a text-mode display... way more complicated.

That's sort of what they're doing. It's just a two-bit QR code: Red, and Not Red.

So, one bit ;)

Hah! Yes, totally. Haha I wonder why I said that?

There is also a "not decided yet" state. Hence, you were right, it needs two bits. :)