Mickey: Your opinion - how much IPC improvement could be squeezed out of a new CPU gen if...

The article below on an apparent IPC improvement of 10-15% for Zen 2 got me thinking of the following hypothetical scenario.

Today's x86 CPUs are pretty well optimized for IPC with large caches, out of order execution etc. So, how much further do you think Intel or AMD could improve IPC performance if they went all out to absolutely maximise it if cost, power use, wafer yield etc didn't matter?

Do you think 50-100%, or maybe even more might be possible? Perhaps we're reaching the point of...

Your opinion - how much IPC improvement could be squeezed out of a new CPU gen if normal limits are removed?

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