It's somewhat of a grey area but if you can get your hands on the IoT version of Windows 10 LTSC - the supported lifecycle end date is all the way until 2032.

I have a dual-boot mid-tower running EndeavourOS (Arch Linux flavor) and the non-IoT version of Win 10 LTSC (support ends in 2027) with strict group policies around disabling of telemetry that's been humming along for several years now.

https://learn.microsoft.com/en-us/windows/release-health/rel...