Suggested changes:

1.
> The early-init file is not meant to support every single
> customization of Emacs, only those that must be done before loading
> init.el.

Then I suggest replacing "desirable" with "necessary" or a similar word
with the meaning "cannot avoid".

2.
Optionally, consider adjusting the wording at the beginning of the second
paragraph.
It sounded perfect until the later commit 4118297ae2f added an intro phrase
(an extracted version of the second paragraph).
Current getting back to the same topic, after discussing another detail
in the mid, without reference to the already expressed idea breaks smooth
perception.

****
Regardless of the changes, please let me know if the patch formatted/sent
the way you'd normally would expect (prefer) it to be done.
I followed CONTRIBUTE guidelines (the file contains a lot of information,
so I might have missed something), used 'git format-patch', and sent
the patch as an attachment via Rmail ('C-c C-a').

Particularly:
The patch itself seems got a whitespace added at the end of file,
even though there's no such whitespace in the diff/commit I have locally.
Is it expected behavior?

Thank you.