Yes, it did :) Though it set off some Odyssey of things to fix with my config after upgrading my Emacs version ^^’

Thanks.

The warning could be clearer on that :/

For me, the main issue was startup speed from my customizations. This I sped up by:

• Making use of emacsclient over new emacs sessions.
• Combining scattered customization files into a single large emacs.el file.
• Use defvar and autoload over require, load, eval-after-load.

The last one is mostly to allow compiler- and flycheck warnings to work, without prematurely loading dependencies of my customization code.