https://learn.microsoft.com/en-us/surface/surface-driver-firmware-lifecycle-support
The Surface driver and firmware lifecycle is composed of two parts: (1) the driver and firmware support period for a device and (2) the support provided for OS versions during that period.
Device support period
The device support period defines the period during which Surface will support driver and firmware updates for a device. The Device Support Period starts when a device is released.
For devices released before January 1, 2021: Surface devices will receive driver and firmware updates for at least four years from when the device was first released. In cases where the support duration is longer than four years, an updated end-of-servicing date will be published before the date of the last servicing.
For devices released on and after January 1, 2021: Surface devices will receive driver and firmware updates for at least six years from when the device was first released. In cases where the support duration is longer than six years, an updated end-of-servicing date will be published before the date of the last servicing…
