What I am saying is that the idea of search across caches as
appealing as it is is is not the whole story.

People search, read, navigate and M/R their data in interleaved ways.
You need to project and think about a 100-200 lines of code that would
use that feature in combination with other related features to see if
that will be useful in the end (or gimmicky) and if the user experience
(API mostly in our case) will be good or make people kill themselves.