The Release Preview channel will continue to exist, but as a hidden “advanced” option aimed primarily at IT shops hoping to perform early compatibility testing with upcoming updates.
Microsoft says that hopping between channels and opting out of the Windows Insider Program will also get easier and that it will generally no longer require users to completely wipe the PC and reinstall Windows. Switching between the Experimental, Beta, and Release Preview channels and the current shipping version of Windows can now be done as an “in-place upgrade” that preserves user data, as long as users stay on the same “core version” of Windows (i.e., 25H2, 26H1).
It’s still a maze, but it’s more predictable
The new version of the program doesn’t seem much less confusing than the current system, as there are still a whole bunch of branches, sub-branches, and exceptions to rules that Insiders will need to keep track of to be certain what they’re testing. But they do address the other major pain point of the Insider Program as it currently exists—the thing where you read about a new feature in a fresh Insider build, install that build to your PC, and then don’t actually see the feature on your system.
In the current Insider Program, that happens because of what Microsoft calls Controlled Feature Rollout (CFR), a process by which new features and updates are released to PCs gradually so that the rollout can be paused if problems arise. This is how Microsoft releases most Windows updates, and it makes sense for the general populace, but it mostly ends up being frustrating for Insider Program users who have already chosen to trade some potential bugginess for the ability to test new things early.