Relevant comedy:
https://www.youtube.com/watch?v=y8OnoxKotPQ
GOAL: Surprise and delight users by displaying their birthday on the setting page.
DELIVERABLES: Display User Birthday on Settings Page
"Surprise and delight" has definitely become one of my new bullshit bingo favorites.
There should be one of these videos for reactive programming as well. Misuse of observable pattern can quite quickly turn an app into a mess, making code navigation / minor change requests a nightmare.