Sometime Today, Sujeet Bhatt assembled some asciibets to say:
But when software security and quality really matter?like crossing the Atlantic on a jet airliner?trust me, you want to fly proprietary.
Apples and oranges. It's important to compare like objects. One cannot hold a word processing application to the same stringent quality levels as an application responsible for people's lives. The quality of code in the latter case has nothing to do with it being open or closed. It has to do with the developer's committment to provide bug free code, and the stakeholder's committment to put resources into ensuring the same.