I use org mode for personal note taking and todo lists, and it has been working very well for me. for projects I put a TODO.org inside the docs folder and any TODO and bugfixes goes there (a simple todo.txt can do the same)
paper has never worked for me, it's hard to keep track of it and others can easily read it.
I remember Casey Muratori was explaining his emacs key bindings in one of his handmade hero videos and he said something like 'I would use any editor that has these key bindings and split windows', so I guess that is when the 4coder idea came to life.
also by using unity build you don't need to link object files. I think that is main reason to use unity build, it eliminates need for any build system and compiling source code in a new machine is as simple as compiling a single transition unit.
You can look around with click and drag but you can't move. There was some art that I wanted to look at from close but I couldn't.
at least an ability to zoom would have been good.
I used Notepad++ for almost 10 years, just for viewing text files because of its right click context menu option and performance. but few weeks ago I decided to try sublime which is good but still notepad++ if faster. (sublime takes a few seconds more to load)
paper has never worked for me, it's hard to keep track of it and others can easily read it.