[development] Why do filter cache entries expire 24 hours after last cron?

[Dave Cohen]

On Monday 31 March 2008, Gerhard Killesreiter wrote:
> ... Since Drupal's filter is "dumb" in the sense
> that it doesn't know on which node the filtered item depends

Gerhard, I'm sure you recognize this... There's nothing "dumb" in not linking 
the filter cache to nodes.  Filters apply to other objects, like blocks, and 
AFAIK there's no hook_blockapi() to tell the filter cache when a block gets 
deleted, updated, etc... 

I'm just pointing that this is not simply an oversight.

-Dave