Microsoft is continuing to improve its delivery and installation process for Windows 10. Those that choose to install the May 2019 update will get a much improved experience when the next big update delivers in September 2019.
Today, Microsoft said…
The next feature update for Windows 10 (known in the Windows Insider Program as 19H2) will be a scoped set of features for select performance improvements, enterprise features and quality enhancements. To deliver these updates in a less disruptive fashion, we will deliver this feature update in a new way, using servicing technology (like the monthly update process) for customers running the May 2019 Update who choose to update to the new release. In other words, anyone running the May 2019 Update and updating to the new release will have a far faster update experience because the update will install like a monthly update.
Getting to the May 2019 update is key to getting this better performing experience. Those that will not update to the May 2019 update before September’s release, will experience the same old, painful installation.
Again, per Microsoft…
For consumer or commercial users coming from versions of Windows 10 earlier than the May 2019 Update (version 1903), the process of updating to the new release will be the same as it has been and work in a similar manner to previous Windows 10 feature updates, using the same tools and processes.
More technical details on this change are available here: Moving to the next Windows 10 feature update for commercial customers