I'm wondering, if there are measurable performance benefits from running in 64bit mode but with only half the pointer and register size due to cache impacts and lower memory usage -- wouldn't those benefits disproportionately matter to organizations that manager their own infrastructure and deploy applications in vast quantities often as containers squeezed into hosts for maximum efficiency?

If that's true, I'm wondering whether the "big tech" / "hyperscalar" orgs have..,
- a) Measured it and found - no real-world performance improvement
- b) Measured it and found - the increased complexity in their own infrastructure was more expensive than the gains from any performance improvements at scale
- c) Measured it and found - the increased security surface risk outweighed any performance improvements at scale
- d) Never measured it - for various reasons is not of interest
- e) Currently using it! Simply haven't spoken up in these discussions - it saves meaningful money at scale

Super curious!