Hi Jesse -
Thanks for reaching out to us. Work In Progress (WiP) was a workaround for longer wizards (i.e. too many pages in the wizard), and this WiP feature would introduce some performance concerns on the vSphere Web Client if many such wizards are minimized by the user(s). We did not implement WiP in vSphere Client (HTML5) as our goal is to solve the root of the problem which is to simplify such long wizards. Could you update us which are the wizards where you would use WiP to minimize them? This information would help us prioritize the effort of simplifying such wizards.
Thanks,
Abhijith