> I ran into an issue with using package.el along with use-package.el. I
> had most of the packages installed via package.el . One of the main
> benefit of using elpa is the easy upgrade of packages that elpa
> offers. So it would be nice to have a facility that enables to add all
> the installed packages to the load-path

(dolist (it (directory-files package-user-dir 'full "^[^\\.].*-"))
  (when (file-directory-p it)
    (push it load-path)))