Comment 90 for bug 1569237

Quote:
 | The xenial box is substantially less useful to Vagrant users with the
 | "ubuntu" user as the default, and there is limited benefit to having the
 | "ubuntu" user.

This is entirely untrue. There is *substantial* benefit in Ubuntu consistency across platforms. Users who are familiar with non-ubuntu images on vagrant may well find use of Ubuntu images made easier the first time if the default user is changed to 'vagrant'. However, users of Ubuntu on any other platform will find Ubuntu *harder* to use on vagrant after your change. Since vagrant users do not make up a majority of Ubuntu users, there is thus more value in Ubuntu acting the same across platforms than there is in Ubuntu changing its behavior to fit vagrant (or any platform that does not hold the majority of Ubuntu users).