Comment by jandrewrogers

A mistake people make with thread-per-core (TPC) architecture is thinking you can pick and choose the parts you find convenient, when in reality it is much closer to "all or nothing". It may be worse to half-ass a TPC implementation than to not use TPC at all. However, TPC is more efficient in just about all contexts if you do it correctly.

Most developers are unfamiliar with the design idioms for TPC e.g. how to properly balance and shed load between cores.