This doesn't make any sense. "Software" isn't produced by a single company with a single set of engineering practices and trade-offs. Safety-critical software

This doesn't make any sense. "Software" isn't produced by a single company with a single set of engineering practices and trade-offs. Safety-critical software has been around for decades and decades, and it's not developed and tested using the same practices as a minuscule D-list feature of a web service.