I’ve loved the 12.9" iPad Pro from day 1, and quickly moved to it as my daily driver.
Finishing up my dissertation, I spend my time writing, editing, and rounding off research. I dump the words in Scrivener and Drafts, and throw PDFs into Mendeley. Akin to EndNote, Mendeley is a reference manager that will sync the PDF library across devices. Mendeley also added a researcher social network, of sorts. Allowing you to interact with authors of papers, assuming they have a profile. Mendeley will also search your PDF library, and then recommend additional articles based on what you’ve added. I’ve been surprised by how good the recommendations can be. I use Notes and Gladys for temporary storage of ideas and information.
I haven’t been able to drop my Mac completely, since I still need to run data analysis on very specific software. Screens is the solution, allowing me to access my iMac and Mac Mini to run the analysis while I continue working on the iPad. I’ve tried to keep my iPad simple, with only a few apps installed. 99% of the work I do is accomplished by the apps in the dock, with me having to dive into the folder every few days for something. The folder also stores apps that I only use during specific times. When I’m teaching Human Anatomy Labs, I bring out the Anatomy specific apps to teach from, as a well as Keynote, which I only use when school is in session.