Why is /var/lib/apt/lists not in /var/cache?

[Stefan Monnier <monnier@iro.umontreal.ca>]

AFAICT, all of `/var/lib/apt/lists` is made of files fetched from
repositories, which APT will re-fetch if missing.
So, it sounds to me like it belongs in `/var/cache/apt/lists`, really.
What am I missing?  Or is it just a historical accident?


        Stefan "whose `/var/lib/apt/lists` is a symlink into /`var/cache`"