A grouping of some sort of the status history – like a gap between the dots (e.g. |||| |||| ||||) could be helpful for indicating at a glance that not the entire group is affected.
It could be a challenge tho, one of my groups got at least 13 components and is likely going to grow. I like how Vigil does this, but it would break Kumas design language.

When clicking any Group, a setting should become available to toggle visibility of all graphs for all sub-children stacked vertically.
The functionality is not only neat, it's also very useful, as you can “correlate” problems in a quicker way by looking at multiple graphs.

any updates?

Hi there! Thanks for checking in.
The core maintainers haven't made progress on this specific issue yet, as we are currently working on a v2.0 release with many improvements, including better performance. See #4500 for more details.

If you/somebody else want to help out in this area, our contribution guide can be found here.
In case you do, please do take care that the work is compatible with other work in this area like #4419.

I like how Vigil does this, but it would break Kumas design language.

@verymilan
I don't quite get your remark about this being outside our design language. (what do you mean eactly by "gap between the dots")
The screenshots for said system out there are not great (=> I don't know what you are talking about)