Ada, Past Present and Future

I believe it was Dr Robert Dewar of AdaCore fame who I first heard remark that ( paraphrased ) every time a bug gets missed at a stage of development ( compile-time to alpha, to beta, to production, etc ) the cost of it's resolution increases by an order of magnitude. I'm certainly by no means dismissing the value of concise languages for expressing ideas fluently, but brevity and expressiveness are only two factors influencing the value of a programming language in a specific domain. It's definitely an interesting paper, every time I see it I can't help but think that it's a little disingenuous to conduct an apples to oranges comparison of languages on these particular merits. It's much more difficult to weigh up the relative investment of time necessary to write code that is equally robust, maintainable and fit for purpose. Here's the video I got the Dr Dewar quote from: [this video]