discussion: limits of objects

[Francois-Rene Rideau]

So, as of inter-code communication, the *big* problem with our
migrating objects (and we know that in a persistent, distributed,
system, they will migrate a lot, and even the seldom migrating will
migrate between backup/persistent store and RAM), is what are the
limits of an object ?

When object A uses objects X,Y,Z,T, we may want to migrate object
A but not objects X Y Z T (unless needed). Then, how to find the
limits ? How can it be compatible with our need for efficiency (i.e.
inline interactions between A,X,Y,Z,T when possible) ?