My theory is that it's the lengthening of the distance in time between major milestones that makes time appear to move faster as you get older. It simply takes a lot longer to achieve anything of significance.
I think your logic is flawed. It is perfectly reasonable to set short term milestones as an adult. When I go hiking with my dog, I frequently set milestones such as, "Make it to the Corral Canyon trailhead from the Latigo Canyon trailhead", and those goals are often the most satisfying of the week when met. You just need to open your mind and learn to appreciate the small things.
Uh, it's going to notify you...
Yes, but it will notify you without warning.
Do I get a volume discount if I want five of them ?
Only if they are all the same article.
Do not simplify the design of a program if a way can be found to make it complex and wonderful.