I am not the author, but I'm in the exact same situation (except I'm 37). And I am following the javascript path. It seems employable, interesting and, not hard.

I know it is a bet, I'm betting in React and if in two years it is old news, I will have to move on. But until then, I am employable.

I am very early in my learning path (started from scracth last November), but I have a very clear impression that it is easier to learn Javascript than any of the languages you mentioned.

Would you care to elaborate more your point? It would help me a lot.

thanks!