https://www.theregister.co.uk/2018/11/28/windows_10_slow_roll_out/

Ad Duplex has confirmed that the Windows 10 October 2018 Update is off to a slow start, and certainly nowhere near the rate of April's release.

Despite having been re-released a few weeks ago, the update has not experienced the ferocious acceleration of its predecessor, and accounts for just 2.8 per cent of Windows 10 installations, behind the 3.9 per cent of 2017's Fall Creator's Update and a long way shy of the 89.5 per cent of the April update.