Re: Customize buttons that change user's custom file should ask for confirmation

[Richard Stallman]

    For example, if you accidentally or mistakenly click mouse-1 (or mouse
    2) on the text (button) Reset to Standard (Erase Customization), all
    of your customizations in your custom file are wiped out! (all of the
    preferences that were visible in the Customize buffer, that is - which
    might be all of them).

That is a good point.  Maybe these buttons should ask for confirmation
with yes-or-no-p.

     You are reduced to a standard-issue Emacs,
    after perhaps multiple customizations over a long period of
    time. Unless you have a backup of your custom-file, you are really
    SOL.

Doesn't this operation MAKE a backup of the file?
If not, can we fix that?