Dealing with Outlook references

When you automate Outlook, you typically create a reference to Outlook.Application and then get the namespace using the GetNamespace() method. Everything you want to do is possible through the Namespace object. loNamespace.Application provides a nice reference back to Outlook. So why would one want to keep the additional reference around?
Local loOutlook, loNamespace, loInspector, loFolder
MessageBox("Please close Outlook now")
loOutlook = CreateObject("outlook.application")
loNamespace = loOutlook.GetNamespace("MAPI")
loOutlook = NULL
loFolder = loNamespace.GetDefaultFolder(6)
MessageBox("Close Outlook window, please.")