There is no "trap" I fell into here. The point of the article you refer to was that there is more value in being more proficient in some language/tech choice ra

There is no "trap" I fell into here. The point of the article you refer to was that there is more value in being more proficient in some language/tech choice rather than jumping around and that the ecosystem matters. From the article > If anything, my progress was often hampered by the lack of libraries, unreliable tools and not spending enough time in any one ecosystem to develop real fluency. These got in the way of working on hard problems, and working on hard problems was the main thing that actually led to improvement. > By way of counter-example, check out this ICFP contest retrospective. Nikita is using clojure, a pretty niche language, but has built up incredible fluency with both the language and the ecosystem so that he can quickly throw out web scrapers and gui editors. Whereas I wouldn't be able to quickly solve those problems in any language after flitting around from ecosystem to ecosystem for 12 years. And I largely agree with this. > You'll mention you can use the Java ecosystem but them you loose all the benefits you mentioned, you say you will keep interop/mutation/side effects isolated but then again you can do the same in JS if some lib is causing unwanted mutation. Been there, done that and I explained honestly above why I prefer having more explicit and built-in boundaries, rather than tacking it on via libraries and discipline. Interop, mutation and side-effects stand out and there are utilities that let you do those things in a convenient, productive way without you having to worry about copying stuff around or similar. There are some really good libraries in the JS world too, that are a joy to work with and are powerful productivity wise. No doubt about that. I merely cited the reasons most important to me why I have a preference and why it feels liberating and relaxing to me to use Clojure over JS in general. There are more, and there are also some downsides. None of them de-validate your judgement or preference.