In the changelog, there's a new 17.3.6720.1207 version. It links to a new Transition from the previous OneDrive for Business sync client for SharePoint sites page that not longer requires you to add a manual registry key (TeamSiteSyncPreview.reg) to transition as mentioned in the old Preview article. It just says this:
Sounds good! But still, the user have to do something manually. I want all my users to automatically move away from GROOVE.EXE. Can someone confirm if the plan in the next-coming month versions is to automatically transition all currently GROOVE.EXE sync'ed SharePoint libraries to ONEDRIVE.EXE sync'ed? Maybe this manual process is just an intermediate solution in 17.3.6720.1207 until Microsoft sees it's working well and in the next version it might happened automatically?