In Doom Emacs (https://github.com/hlissner/doom-emacs), Org's babel
packages aren't loaded all at once with org-babel-do-load-languages, but on
demand when their src blocks are encountered (fontified) or executed. Same
with its export backends.

Dooms maintainer, Henrik Lissner, has kindly extracted his code into a gist
(https://gist.github.com/hlissner/14b42de71c65945f55a31b393af0391b)
following a GitHub issue (
https://github.com/hlissner/doom-emacs/issues/2536#issuecomment-586088410)
and the interest expressed in a Reddit thread (
https://www.reddit.com/r/emacs/comments/f3ed3r/how_is_doom_emacs_so_damn_fast/fhixxjx/
).

I think this would make the org-mode literate programming experience
significantly smoother.

Any thoughts on including this in org-mode?