I'll second this question.
Similarly, I'm trying to create a View that includes Summary Rows for 2 Custom Groups. Those groups are 'Production' and 'Test, Dev'. Each of those 3 categories have vSphere tags, the 2 Custom Groups were easy to create. I also created a 3rd Custom Group that contains these 2 custom groups as well for testing different methods.and I can create a Summary View of a single custom group, but not one that shows both groups individually.
I have also tried a List with a Summary Row with VM as the Subject to get the Metrics I want, and group by Environment (this would not be an acceptable solution in the ways I've tried it yet). I attempted 'Show the Total' for various metrics, but this has multiple problems. 1) It lists every VM before the summary 2) The summary is for everything again, not individual components, and 3) When I 'sort by Environment', it lists all the VMs in each environment they belong to (i.e. the Custom Groups I've created, AND SDDC Health Group and 4) Totals the resources of those duplicated VMs (so resource usage is shown as more than double than exists in the environment).
Is there a way to accomplish this without a MINIMUM of multiple new Super Metrics?