Do vim's folds give you a full literate programming environment with support for executing code, saving results in vars, WEB syntax, etc? From what I'm familiar with, vim's folding is a lot closer to outline-mode[1], which org relies on for folding. The folding is a very small part of org-mode's functionality.
[1] https://www.gnu.org/software/emacs/manual/html_node/emacs/Ou...