package-recompile-all currently attempts to recompile all packages,
including the system packages listed in package-directory-list.

System packages are generally byte compiled as part of installation, and
are not writeable by normal users.

package-recompile-all attempts to recompile these, which will almost
certainly error out due to this.

It would be better if package-recompile-all only tries user installed
packages (in package-user-dir), which are more likely to need
recompilation.  Perhaps as a prefix arg option?

In GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.37,
 cairo version 1.16.0) of 2023-09-03, modified by Debian built on
 kokoro-ubuntu
System Description: Debian GNU/Linux rodete