New
#3420
Yes, I think you are right. Now you mention it, I seem to recall it was specifically for 1803 users who could switch to being Insiders as a means of testing if the 'delete all user files on upgrade' bug had been fixed. The same fixes (plus a few more) were also in .55 for those already on the public 1809.
KB4467228 Windows 10 October 2018 Update Build 17763.17 to Insiders Insider - Windows 10 ForumsToday we take the next step towards the re-release of the Windows 10 October 2018 Update by providing the updated version to our Windows Insider community.