Since XenApp / XenDesktop 7.7 you can configure zones for geographic deployment around the globe, put your Delivery Controller in the Zones and so on, But Zone preferencing is more powerfull than that only. Remember to XenApp 6.5 you con configure prefered Loadbalancing to switch your users to other servers with the same published application […]
James Kindon has written his onw blog to analyze VDA 2016, BIS-F, WEM, CTXOE and VmOSOT in combinations. We will say thanks for this great blog and read all the details on his site. https://jkindon.wordpress.com/2017/09/02/image-optimization-analysis-citrix-xenapp/