I would actually like to get __working__ delay notifications. Last I took DB I remember delay notifications be adjusted on a "we exceed the delay already" basis

I would actually like to get __working__ delay notifications. Last I took DB I remember delay notifications be adjusted on a "we exceed the delay already" basis. Example: train expected at 1200, at 1155 you get a 10 minutes delayed notification. Which will be replaced at 1212 by a 15 minutes delayed notification. Which will be played this way more or less until the train finally arrives. So you see, a working delay notification would actually be a real improvement. I have not problem with delays in general, but I do like to know if it even makes sense to wait, or if I should get a car or plane ticket to make my schedule.