I might get downvoted, but I believe that using "strict" mode is not worth it precisely for the reasons this article talks about. You get at least 90% of the benefit of Typescript (IDE support, typos, refactoring, etc) without --noImplicitAny and other flags that induce a lot of boilerplate and wasted time. After all, how confident can anyone be that DefinitelyTyped types are correct? I use types when I find them useful. I also enjoy being able to not use types when I don't need them, which is why I choose to use Javascript.