Enablement packages have been utilized by Microsoft in previous Windows 10 feature updates. Essentially, they preload the upgrade onto the PC, allowing for a quick and seamless installation by merely downloading the enablement package. Consequently, the 23H2 update for Windows 11 is expected to be a relatively minor update without major fundamental changes.
This aligns with the typical nature of enablement packages, as they are often minor updates that share the same code base. Similar approaches have been observed with Windows 10 upgrades delivered through the enablement route.