I have had the same mobile number for the last 20 years now and it feels good to be part of this select club. But these unpleasant customer experiences helped me learn something: Had my original operator provided high-quality services, I could well have stayed loyal to it for the next 15 years (and more).
So, with every new feature, you can evaluate the resilience of your system.
Confidence that your system can handle turbulence caused by any direct or indirect module/system within the entire ecosystem.
The Simian Army Project by Netflix gave us a new thought process to challenge our system with random failure mechanisms by using various system resilience tools.