> And why don’t they spend 90% of their time testing and verifying and proving their software has no defects? Because defects are inevitable and they’re not hel

> And why don’t they spend 90% of their time testing and verifying and proving their software has no defects? Because defects are inevitable and they’re not held accountable for them! For a huge part of the industry, the reason is entirely different. It is because software that mostly works today but has defects is much more valuable than software that always works and has no defects 10 years from now. Extremely well informed business customers will pay for delivering a buggy feature today rather than wait two more months for a comprehensively tested feature. This is the reality of the majority of the industry: consumers care little about bugs (below some defect rate) and care far more about timeliness. This of course doesn't apply to critical systems like automatic drivers or medical devices. But the vast majority of the industry is not building these types of systems.