Brandon Robert – Actually as of last month, you can! The new target version policy will let you stay on a release, so long as it is supported, until you change the policy. This can be done via Intune, Group Policies, or some other MDMs. I know this isn’t the same approach as “defer update” but will hopefully give you the same result with as much or more control.
For Group Policy, the policy can be found under the Windows Update node > Windows Update for Business > Target Release Version. To do this, you will need to download the new 2004 ADMX template that was just published and apply the new policy, which will work for all devices on 1803 and above who took the May security update.
*note: This policy will take precedence over Feature Update deferrals, meaning that if Target Release Version is set Feature Update deferrals are irrelevant.