Add an upgrade path to upgrade a client OS (e.g. Windows 10 Pro) to Windows Server.
A lot of small organizations start off using something like Windows 10 Pro for their server, but as the organization grows they'd like to upgrade in place to Windows Server. Right now, you can't do that. So I have seen a lot of organizations stay using the non-server OS basically until the server hardware fails and the recovery needs a clean install anyway. An in place upgrade path would definitely increase sales.