This "rebuilding" will allow more devices, including Macs and Windows 7 devices, to use Edge but also to remove it from Windows 10 so that the browser can be updated as an application and not as part of operating system.
While Chromium Edge has not yet been released to the public (expected to start a preview, to a select set of users first), there are still more signs indicating that the semi-public release is approaching. Earlier this month, some images and information about Chromium Edge were released.
Now, however, the download link of an Installer for this browser has been released, presented as "MicrosoftEdgeSetup.exe"
However if you try to install it, you won't, as the installer is only available to Microsoft employees and "Azure Premium" users, according to a blog post.
Rebuilding Edge from a proprietary part of the Windows 10 operating system will definitely be one of the most interesting stories of 2019.