xenodasein--- via "Emacs development discussions." <emacs-devel@gnu.org>
writes:

> Basically Custom is an unfinished system, it's code is not easy to
> understand, and it does not integrate with the rest of Emacs well, it
> especially does not play well with configuring things from init.el
> file.

Custom is basically a finished system, and the whole point of it is to
make things work so that users will not have to understand it.

And contrary to your statements, it integrates with the rest of Emacs
quite well.  For example, this doesn't work:

  (setq pixel-scroll-precision-mode t)

But this does:

  (custom-set-variables '(pixel-scroll-precision-mode t))

Same goes for `scroll-bar-mode', and so on.

I don't understand customize and I know a few other people from the
#emacs IRC channel who are also long time Emacs users and who also say
that they don't understand customize well enough...

A few weeks ago I made a video - called "Org for non users" - about
why I find some parts of Emacs that are "for users" very hard to
understand, and showing how I am trying to make them more
understandable by "non users" like me... and I would really like to do
something similar for customize in the next few years.

The video is here:
  http://angg.twu.net/2021-org-for-non-users.html

Cheers,
  Eduardo