I realize this has been asked for in the past, but dismissed without much explanation of why it is "not planned." I'm the admin of a Box enterprise account. Co-admins in our enterprise org require user-level file access to perform their job duties. While our corporate policy does permit employees to use their Box accounts for personal data, there are numerous issues with this:

1) I travel frequently, and need offline file access, from my computer and devices; can't do that if I have to log out and back in.
2) Box Drive on mobile devices is not particularly useful if I have to keep logging out and back in, nor easy to do with two factor auth using hardware token.
3) We'd have policy conflicts. First, I don't want every personal collaboration showing up as an external collaborator in our Box enterprise account, as those require routine audit. Second, our enterprise settings restrict certain types of collaboration I may want to use for personal collaborators. Third, we have retention policies and governance policies that may conflict with my personal files.
4) Obviously, if I were to end my employment, then it's a big nightmare to extract my data to a personal account.
5) I don't want our co-admins having access to my personal files, even if they aren't supposed to be looking at them.