I wonder what would be possible if we could move away from the text editor and code with an e-pen on a tablet, the way mathematicians use a black board, where t

I wonder what would be possible if we could move away from the text editor and code with an e-pen on a tablet, the way mathematicians use a black board, where the parsing is not from left to right, but follows specific paths in two dimensions (like the notations for fractions, square roots, sums, integrals, etc. we learned at high school). -- Has this been tried out recently?