Microsoft going to extreme lengths to ensure May update avoids mistakes of 1809

It's going to be the May 2019 update, because Microsoft is being a great deal more cautious about this release. Next week, a build will be pushed to the Release Preview ring, which should provide around a month of testing before its expected release date.

If Microsoft sticks with its plan to leave the feature update optional until it becomes a prerequisite for support, many Windows 10 users may not find themselves upgrading for more than a year after its release.