Subject: bug#52477: 27.1; .crx and .crx3 are zip files

From: Eli Zaretskii <[email-masked]>
Date: Wed, 22 Dec 2021 14:55:29 +0200

> Date: Wed, 22 Dec 2021 14:50:43 +1100
> From: "Trent W. Buck" <[email-masked]>
> Cc: Michael Albinus <[email-masked]>, [email-masked],
> 	[email-masked]
> 
> Someone mentioned libarchive, originally from BSD, which provides a
> standard interface to EVERY(ish) archive and compression format.
> 
> Is it reasonable for emacs to just chuck out arc-mode (and tar-mode
> and jka-compr) and instead just use libarchive?

It's reasonable, but Someone™ should write the code to do it.