It would be nice to trigger on state change on a set of entities defined by a label or category. Currently this is only possible by duplicating the information of which entities have which labels. I understand this might be difficult to implement but it should make automations more DRY. I particularly want this sensor templates that depend on labels and have a different trigger but currently I don’t believe they can react to state changes of the labels.
It isn’t clear what you are asking. Labels do not have states and Categories exist only in the frontend.
In the text of my post I believe I better defined it. But I’ll define it again here.
Use a label as short hand or syntactic sugar to represent the set of entities to listen to for state change. In other words: state change trigger is still waiting for the entity id, but we can blanket say “all state changes for entities with label”.
Edited title to maybe express that better too.
Based on the closing of this PR a couple months ago, I would say the likelihood that any kind of trigger based on the individual states of grouped entities is unlikely any time soon.