Prevalence of Turbolinks/PJAX-based Rails apps

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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?

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