I agree. We were an early Crashlytics adopter that also used TestFlight for Ad Hoc testing. When TestFlight launched TestFlight Live and introduced its own crash logging service, we saw no need to keep both in the app and shut off Crashlytics. Anecdotal of course, but I think the theory here has merit: crash logging is a feature, not a business model, and the Crashlytics team made a good move here.