Reading Time: 2 minutes The VMware vSphere Host Client (or Host UI) was initially released as a fling in 2015, and then included as the default host client GUI interface with vSphere 6.0 Update 2. A web HTML5 interface was needed in order to replace the legacy Windows’s based vSphere Client. And was a good solution, light and fast enough… But after 10 years it becomes old and the user experience is too much different compared to the vSphere Client (HTML5).