I've replaced Exchange 2007 with Google Apps, but now am facing the obtuse Exchange removal process. It seems that I need to go in and tear everything out manually (to uninstall I have to first remove the databases, to remove the database I have to first delete the mailboxes, shared address books, shared folders, etc) before uninstalling Exchange from the server, then I still have more work to do to clean Exchange out of AD.
This seems silly. Aside from general good hygiene, is there a compelling reason to uninstall Exchange properly rather than just wiping and repurposing the hardware?