It would be ideal if KDE would provide notification events for: attached USB devices attached HDMI/VGA devices RJ45 jack connection uplink wireless connection established SDcard reader card inserted detection powerbutton pressed notification those are basic notifications absent from KDE which would be a great compliment to the system.
Also include to the list airplane mode notification.
Why do you confirm your own tickets? Please report one ticket for each feature, as they have to be handled by different components.