I mostly use Hook to connect my legal research. I use it to connect between Craft (my preferred writing app), DevonThink 3, websites and sometimes PDF Reader Pro. It’d be great if it had a Word integration, as I do end up having to write in Word way more than I would like, or at least, until Craft adds footnotes.
I use my iPad Pro quite a bit for legal work as well. If Hook worked on the iPad, I would probably use it even more.
I have started using Things3 more because of integrations, however, my brain works better with the Sorted app. If that one was Hook friendly, I would link my tasks as well.