I should mention that developer ergonomics is another key differentiator. NativeScript exists for Telerik's bottom line. For example, instead of providing a nice HMR facility, they invested thousands of hours into building a pay-for cloud offering (AppBuilder LiveSync). They are a company and I don't fault them for monetizing a significant investment they made in this platform, but when looking at the available options this is a negative.
I had exactly the same thought: Telerik is a tool company so must make money from nativescript (no problem with that) while Facebook can affort to make RN into something really good without it ever hurting its bottomline. For them its an investment to attract new devs.
