Personally I think it would be good if MS focused on delivering a more self-contained Exchange that did not so heavily depend on the specific OS version. The installation experience from deploying Exchange is still one of semi-frustration. Why does the
installation just report on the necessary prerequisites instead of automatically installing them ? - especially when automating this is done in a few lines of Powershell. Similarly the installation will fail disgracefully if it doesn't connect to
https://crl.microsoft.com/... - even if this connection is not really essential to the installation.
Little details perhaps, but wishing for an installation-experience that will have the smoothness and simplicity of a game installation should not be too much to request. I'm sure the MS developers could have this as a "stretch-goal".