Useful VMware KB article before upgrade to vSphere 6.5

I have just found following very useful VMware KB articles and blog posts which should be read before any vSphere 6.5 upgrade and design refresh.

Update sequence for vSphere 6.5 and its compatible VMware products (2147289)
https://kb.vmware.com/kb/2147289 

Important information before upgrading to vSphere 6.5 (2147548)
https://kb.vmware.com/kb/2147548

Best practices for upgrading to vCenter Server 6.5 (2147686)
https://kb.vmware.com/kb/2147686

Platform Services Controller Topology Decision Tree
https://blogs.vmware.com/vsphere/2016/04/platform-services-controller-topology-decision-tree.html

Reconfigure a Standalone vCenter Server with an Embedded Platform Services Controller to a vCenter Server with an External Platform Services Controller
link

How to repoint vCenter Server 6.x between External PSC within a site (2113917)
https://kb.vmware.com/kb/2113917