I usually answer "Javascript is bad" statements with "English is not the most declarative language too, but ... it's the most common". Anyway I think JS is not a part of my statement, so I'm not going to agree on why JS sucks. It's opinionated. And contrary to logic it works good when you get used to it.
About Electron. I think nobody will build Photoshop or 3D Games ( at this point ) using it as a platform. I would personally decline if I have an assignment like this. But for apps like Slack, Visual Studio Code, Atom, etc, it works pretty good. Something more. I'm actually working on my own accounting app that suits my needs, which I would not be able to do for that limited spare-time I have these days If I used Objective-C / Swift.