Earlier quoted context omitted.
> "There are already cross-platform toolkits that can deliver everything a browser engine can, faster and safely." Nothing with the reach of web technologies. The closest I can think of is Qt, but there are issues with deploying Qt apps on some platforms.
So our choices are • Native applications that give users excellent UX and performance • Web apps that are equally quirky and slow on every system ?
To give an analogy, it's like programming languages. It's possible to write very fast code with assembly languages, yet their portability to other architectures is practically non-existent. Part of the reason higher level languages like C/C++ are used is because they are much more portable.