as shown in the attached pic. I updated my 950xl to the latest insider preview build 14977 and gave it a factory reset. after the initialization process I found the home screen incomplete and a lot of ms apps, e.g. outlook mail, outlook calendar, OneNote, OneDrive, groove music, movies and tv, maps, Xbox, missing.
it's interesting that you can't uninstall these apps in previous builds. now they are missing. you can't find them in the app list.