The emacs lisp tradition (or at least this is how I see it) splits functionality among files. As explained in the changes, there are files like ob-julia.el to w

The emacs lisp tradition (or at least this is how I see it) splits functionality among files. As explained in the changes, there are files like ob-julia.el to work with the Julia programming language in Babel (literate proframming system in org) There is a file for language, for example. There's also the documentation and auxiliary files. I don't see where the problem is, org is huge but easily hackable due to this splitting