I prefer this style. I primarily use Emacs as someone else mentioned. I feel like it's sort of similar to editor tabs vs buffers. Like, once you have a good way

I prefer this style. I primarily use Emacs as someone else mentioned. I feel like it's sort of similar to editor tabs vs buffers. Like, once you have a good way of switching between buffers, separate editor tabs seem like a superfluous UI element. In a similar way, if you have powerful ways of navigating to the function definition you want, then everything being in the same file doesn't seem to matter. Also, having all the code in a single file helps expression exposition of the code. You can sort of captivate the reader of your code, and present the code in the order of your choosing.