I ate at a restaurant and stopped at a Starbucks last night with a friend because we were playing the game downtown. If it wasn't for that game I would have gone home and cooked dinner and made my own coffee. Once again anecdotal evidence but I wasn't the only person last night doing the same thing.
I absolutely hate jquerymobile, you should just make your website responsive with CSS media queries then pepper in a little bit of javascript to handle things like slide out navigations.
Why, because the entire point of react native is so you can use javascript to handle your logic in your app. This lets you bring in a ton more developers for your projects than just the few people who know Objective-C/Swift.
So using a project and disagreeing with it's entire purpose for existing is silly without further explanation of why javascript is bad for this type of thing.
In his argument he says they should be using Objective-C over Swift, which is just wrong. Apple says to use Swift, it's faster and easier to use.
Beyond not liking javascript as a language it's super fast and easy to learn why not make it so more people can start developing apps using that language. It will create better apps that phonegap apps.