I am very serious, Neil. I am glad that your personal experience is different. You were able to build a system that works well for you. As a person who works a lot with multimedia, I can tell you that a proprietary video editor will be in most cases much more stable than a floss one. And why shouldn't it? Teams are working on it 40 hours every week, all year round.
Nothing in the concept of FLOSS promises floss software to actually be more high quality or more stable. All it guarantees is that you can distribute it and modify. So why would it magically be more stable than proprietary?