They probably wanted to fix the confusion about what type of core was fitted into each processor, as the 3000-series desktop processors contain Zen 2 for the pa

They probably wanted to fix the confusion about what type of core was fitted into each processor, as the 3000-series desktop processors contain Zen 2 for the parts without iGPU, but use Zen 1+ for the parts with iGPU. 4000-series currently is only parts with iGPU and Zen 2, so they have comparable performance to the 3000-series desktop processors without iGPU. So, I expect that iGPU-enabled parts which contain Zen 3 will also be branded as 5000-series CPUs.