Prevalence of Turbolinks/PJAX-based Rails apps

I'm curious to know how prevalent the use of Turbolinks/PJAX is amongst professional Rails developers relative to Angular/React/Ember + Rails API? After watching some recent presentations on Rails 5 with improved Turbolinks/PJAX I came away with the impression that Rails 5 presents the strongest case in its history for server-side, document-based apps countering the undiscriminating adoption of SPA approaches.

If you're a professional Rails developer what's the split between PJAX/SPA in the projects you've completed?

gvim