Re: Incorporating caching into defgroup/defcustom/defvar for Emacs 25

[Stephen J. Turnbull]

Sean Allred writes:

 > Specifically, his point about defcustom is a good one. Such
 > variables shouldn’t be cached in the same sense.

Why not?  Custom provides a "reset" functionality if the user *wants*
to reset.  It's not clear to me that a user wouldn't want changes to
customizable variables to persist.

 > stash.el was and is designed as a patch for the lack of “internal
 > persistent variables”. The additional keyword(s?) to defgroup and a
 > defvar* macro would suffice.

What does stash provide that a session manager such as desktop.el
doesn't?  That wasn't clear to me from your long email.