On its third birthday, the original Surface Duo is no longer supported by Microsoft.
Microsoft is done supporting the original Surface Duo, three years after it first launched on September 10. The company has stated from the very start that the Surface Duo would receive just three years of OS updates, meaning today is the last day that Microsoft has to stay true to its word.
Going forward, Microsoft will no longer ship new OS updates or security patches for the original Surface Duo, meaning Android 12L is the last version of the OS it will ever officially receive. Surface Duo only ever got two major OS updates, one shy of the average three that most high-end flagship Android devices get these days.
I'm having issues finding an article on how once installed Linux on a Surface Duo, but there's a got page on building the kernels so I'm guessing it's doable.
Now that updates are done, maybe all the Linux users can find them for cheap and convert them
Sadly this is just the Intel/x86 Surface. The Duo is an ARM devices and doesn't work the same way.
It's like one needs some patches so some hw works properly. The other one needs rewrite most of stuff to barely function. That's why so little Linux ARM device except ones made to run it in the first place. Generally ARM devices run Linux like able to run Android, but the other way around doesn't always hold (more like 99.99% as seen in all Android phones)