Well I might be wrong but from what I gather, Catia was created to be compatible with budget workstations, which makes sense from a marketing point of view, so once a certain threshold is passed, it becomes less about Catia and more about the demands of the particular project being worked on.
For my project (aerospace), about all I can glean from the research done thus far is that unless I'm prepared to spend millions, I'm not likely to ever reach a point of redundancy as far as ram, gpu and cpu power is concerned.
I'll understand if this thread dies or even gets deleted since this all probably appears pie in the sky stuff, and this is something I've had to deal with over the course of the ten years that I've been working on this.