I've been a part of some fairly large JS projects. I think you can develop solid software in either case. It boils down to the developer in most cases. Having said that, there's no doubt you're given the ability to do a lot more around enforcing structure with constructs such as abstract classes or interfaces. the timing of this post is interesting as I recently put a project up on github (https://github.com/vannatech/blade) for essentially coding JavaScript in a .NET-ish environment. I think maybe even as valuable as some of the thing strong typing brings is the ability to make use of the IDE (you get Visual Studio, assembly referencing etc). For building reusable components I feel like it's definitely the way to go. For annotating a page to add UI features, I'd push for JS. Then there's a lot of area between that where it could vary depending on other factors. Overall I can agree on some levels with the post. But I think, as in most things, it's important to understand the underlying technologies. Abstracting away JavaScript and the browser related APIs will inevitably lead to bad results.