bug#31558: 27.0; `custom-file' settings messed up by Emacs 27

[Drew Adams]

> I will play along those lines:
> 
>   :set (lambda (sym val)
>           (eval-after-load 'tramp '(custom-set-default sym val)))
>   :initialize 'custom-initialize-set)
> 
> Tomorrow. Tonight, I'm running out of time.

Yes, maybe that will do the job.  Thanks for trying.