Is this legit? That performance jump seems insane! I can take my current CPU and jump 4 generations, and barely see an increase of a few points/percent. Yet Ryzen 5000 is supposedly ~20-30% greater then just a gen earlier?!
It's possible especially in some select benchmarks. ST IPC is ~19% better on average vs Zen2, that is massive jump and what we could call a true gen to gen leap.
Regarding the MT performance and the reasons why it might not reflect the full 19% (in some cases), it doesn't really matter. AMD has such a massive MT (throughput) advantage over intel that it's not even funny anymore. The only benchmarks in which intel has some advantage will be AVX512 and that is like 1% of the workloads (if that).
Zen3's competition in MT workloads is Zen2 which is considerably slower - so all is good.
AMD now has a better chip in every segment, with higher IPC (Zen3) cores and higher core counts. Zen4 can just get the MT throughput to another level, with more cache, more chiplets and even more IPC. Intel will
need Golden Cove cores with the same core count and same clock speeds to even stay on the same level as Zen4 cores and we know this will not happen as per their latest roadmaps. So relax, MT performance is great as it is and ST is the best in class. AMD is in a great place and I hope they keep their foot on the gas.