
Note that this post becomes obsolete with the vSphere 6.7 Update 1 release where the client it’s finally complete.
Some months ago I’ve written a post (Is the HTML5-based vSphere Client ready to replace the vSphere Web Client?) on the limitation of the new vSphere Client, but this was before the vSphere 6.7 and vSphere 6.5U2 releases.
VMware vSphere, during its history and the different versions, has got several types of Graphical User Interface (GUI) client.
One of the most used (not the first, but the standard one since Virtual Infrastructure 3.0) was the vSphere Client for Windows. But on May 2016 VMware has announced that the Legacy C# Client (aka thick client, desktop client, or vSphere Client) will no longer be available with the vSphere 6.5 release, replaced by web-based clients.