What I find amusing is that all of today's SPA frameworks/views are kind of descended from Angular, which Google built internally after learning the lessons of how to build such a thing while putting the Gmail front-end together. We 15 years of SPA usage in email applications demonstrating their superiority. We have things like Facebook, the one true SPA which rules them all. And yet. Turbolinks.

(And I say that as a big RoR fan!)