I have been reading this great book: http://www.goodreads.com/book/show/25744928-deep-work that has gotten me to ask some hard questions about my work, life style, career and its progression.
I was seeing few crashes in fabric that are saying rooted phones and that are no reproducing on a rooted device and also this keynote from @RealAlanCrouch talked extensively of its benefits for testing.
I accidentally found that in Xcode 9 UI tests need no more a simulator to be present to run the tests.
There are also a myriad of improvements for simulators and XCUITests.
Checkout this detailed blog post: http://shashikantjagtap.net/hands-xcuitest-features-xcode-9/ for more info.
Originally at: https://medium.com/@satyajit/how-to-create-an-android-espresso-test-for-a-parallax-toolbar-gesture-5768053de73d#.evkn2pbm5