I agree. In the system I'm currently working on, they can't. I think it would be possible to implement, but no one has been able to take the time (or, perhaps sees the value in it).
(OTOH, I kind of doubt developers at Google or Facebook run the whole thing locally, so there must be some kind of end state for this.)
(OTOH, I kind of doubt developers at Google or Facebook run the whole thing locally, so there must be some kind of end state for this.)