Hi.
We didn’t forget our retina users! 🙂
Our experience with the newer versions of Qt used on mobile clients didn’t give us solutions for the High-DPI displays, so we need to handle the request differently, and to track this change we opened some time ago this feature request:
Adding an option to use native resolution on High-DPI displays
https://www.nomachine.com/FR02M02864
So far we didn’t give much importance to it because, as you said, the user can always configure the desktop to use more space or he can resize the remote desktop to use a bigger resolution, but as High-DPI displays become more widespread we understand that raising the priority of this feature has become important.