I run Windows 10 LTSC 1809 which has extended support until 2029-01-09 (security and bug fixes). Licensed via my academic institution. It is stripped of the store, edge and a few other features which may be a draw for some.
curl has been included in Windows for some time (in %SystemRoot%\System32, so even in the %PATH%). If you have a direct download URL, it can be used as a last resort.