My feeling is that the question isn't how much memory, but
rather how
much CPU and bandwidth is necessary to deal with routing thrash.
Sure. Resources in the end.
Yes, you can aggregate different things to try to reduce the number
of entries, but that would seem to go against the general
idea Alexei
was suggesting. I mean, I'm an entity, and it'd be cool to have my
own routed PI address and not have to deal with reconfiguring my
network when I took my laptop from work to home...
Sure. But, you think the majority of employers feel warm and fuzzy
about this...? I would say the answer is a violent "hell no"... Most
security folks get moderately freaked out by people moving machines back
and forth, let alone IP addresses.