So everyone is going to have to switch from Workspace to O365 email when they get promoted from E-3 to E-4? Migrate all the saved messages and presumably switch addresses? Isn't that a low level enough that it will apply to basically all enlisted?
No, they will just claim for months that they will automatically migrate your e-mail and then instead of doing that, they'll cut you off from your old account one day and you'll lose all 10 years of mail in it.