#rx #observer
Ууууу, жир: статья про Observer pattern сына мамкиной подруги. Причем пейпер интригует с самого начала:

For an answer on the status quo in production systems,
we quote an Adobe presentation from 2008:
• 1/3 of the code in Adobe’s desktop applications is devoted to event handling logic
• 1/2 of the bugs reported during a product cycle exist in
this code