I managed to build an entire website (the OS X Hackers site) with my iPad Air 2 and edit quite a few pics so it has some potential to give my MacBook a break. It already took it's spot for note taking in some of my classes as well. People here are really undervaluing the great developers that make these tablets stand out.
I still need the iCloud Drive app to get a few updates like selecting exactly what remains downloaded on the device or not like Apple Music and Photos does. I'll be golden then.
You have a really good point. It's not what you have, it's how you use them, and how well you know your stuff. There are people who can achieve infinitely more on an iPad Pro than some people can on a Mac Pro.

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A computer is something that you can drag and drop files into.
If that's the criteria, then I'd much rather use iOS over Windows 95.