You don't necessarily have to give equal weights. Plus the whole reasoning tends to imply old versions are overall better (you don't have just one bug added or

You don't necessarily have to give equal weights. Plus the whole reasoning tends to imply old versions are overall better (you don't have just one bug added or removed from time to time, you have to consider the overall bugginess over time, and if the project is well maintained, it will hopefully eventually decrease, especially if your usage scope remains constant) But the reality is simply: it depends. On the libraries. On the application. On the platform. On the languages. On the tooling. On the maturity of all of that. And even so, you may want (or be forced) to take an hybrid path (classic example: a program for Windows -- static is reasonable, but not for platform libs, and actually just not even available in this case)