It's not bullshit if it's a valid consideration when you are trying to build an app on say iOS and weighting it against say Swift. How many times does this need to be said? It depends on what you are trying to do and what you want.
Ok, this is a good point. But, the author just point out the quirks of JS language, and not things about the RN itself. Would be more fair if he pointed out the quirks in python or had focused on the RN. All he says about JS is very well known and is there since 90s.
Also, he is saying that its not safe because he can't understand and workaround with the pitfalls, JS has a lot of problems, but also has a LOT of great solutions for them, and by that this not means that the language is not safe, just means that its harder to work with.
