And even then they didn't pivot to "don't break anything." They still are willing to break user workflows are quickly test new features that have a high risk of being rolled back. They key is that they are able to set more explicit tradeoffs on the risk they want to take relative the benefits and what scenarios they want to optimize. The same applies to all engineering disciplines - arguably managing requirements and tradeoffs to produce a working system is what makes something a work of engineering vs another discipline.