My question is similar to this one: https://math.stackexchange.com/questions/1833459/math-without-pencil-and-paper Except I'm not physically disabled.
Pencil and paper have been used for centuries to calculate things. It works, but it is not environmentally friendly and storing paper is a hassle. Doing it using desktop computers isn't efficient because the keyboard and mouse limits you. But nowadays, we have tablets, styluses, kindles and all sorts of small high dpi devices to play with.
Therefore I wonder if any mathematician or student have found something that beats pencil and paper? I suspect the answer is (still) no, but I wonder if someone has tried? How far off are we until we can go fully digital? With far off I mean what were the limiting factors? Low dpi, stylus sensitivity, low display contrast or something else?
Edit: Even though this question is opinion-based I like @JoeTaxpayer's answer. The writing in his screenshot looks a little smushy... Not as "detailed" as you can write on paper. :) So if the iPad is the best for handwriting, I will have to wait many more years before I can replace my pen & paper with an electronic device.