I wonder if there is a systematic difference between companies with solid development and companies with wonky development. Is there a different hiring philosophy in place? A different type of tech stack? A different management structure?
Just a week ago, Twitter lost over 20% market cap because they noticed that they were showing people device-personalized ads even though they were opted out of that. After they fixed it, revenues went down.
In other words, a stunning 10 billion dollar of Twitters market cap was based on the illusion that the tech was working as expected. While in reality it was wrecking havoc.
Is it really possible that a feature that makes up a quarter of the companies value is not being tested?