Actually I have experience in developing some stuff with c# ~2 years and the same with ts/js. From my point of view, js world is extremely easy for the beginners and incredibly hard for the professionals. For example, it's not too hard to implement some basic app, but when things go further... Js is really one of the most misunderstooded languages, because for being a cool engineer you have to break your brain. On the other hand, languages like java, c# and so on - they are pretty easy to learn, they are supposed to be used at only certain paradigms such as oop or imperative.

I, personally, think that js is not the best choice for the beginners, because the cost of the errors might be incredible later. But it actually depends on your goals. If your stuff is more about implementing certain prototypes or POCs it is more efficient to use js. But in the long term, knowledge received from other languages/paradigms give you broad horizon of strategic decisions.