> Some packages will stay the same for years, but in the past week > I can see four occasions when changes in list contents have occurred > on oldstable. So there's little similarity.
The question is not really whether "apt/lists" is similar to "apt/archives", but whether the content of "apt/lists" is appropriate for `/var/cache`. AFAIK nothing bad will happen to your system if you delete `/var/lib/apt/lists`. It will still run as before and you can still install packages as before. The only thing that seems to be impacted is that some APT operations will temporarily work in a kind of "degraded" mode until the next `apt update`. That seems similar to things like `locate` failing if you remove `/var/log/plocate/plocate.db` (until that DB is rebuilt). Stefan