I've noticed some people have their init files in org-mode, using
Are there significant performance penalties or other disadvantages to doing this?
One disadvantage is that if you use org-based config only, and it re-writes
init.el file on each save or restart (example), then any changes made via Easy Customization Interface are lost after restarting Emacs, since those changes are written into
.el file directly.
You can avoid this by having a slightly different setup, but then your configuration might end up in two different places (
el-file), which goes against the premise and convenience of having org-based configs.