> [...success with IPCs...]
> Are there hardware/software factors that might be affecting the
> stability (other than I don't push them to the limit)?

Based on my own experiences, I suspect that your IPCs are not paging to
any significant extent, and that this is relevant.  (Every crash I've
had that I can ascribe to this has been at a time when paging either
definitely was occurring or plausibly might have been.)

This is however just a suspicion, on both counts.

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