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 no expert but I imagine that with a device like this, which will no doubt be popular amongst techie-types, there'll be a custom ROM out for it soon enough
There's a very grassroots Windows 10 ARM hack for the SD1, actually.
It's quirky, and lacks a LOAD of the driver blob that comes in a normal x64 install of Windows on AMD or Intel, but it can make outbound calls and run simple WinonARM apps.