Apple have made those types of laptop look silly now. Clearly sales will be lost to Apple and prices need adjusting.
It’s a SOC design. I can’t see Apple building a CPU and separate GPU. Unless Apple have another strategy. I did hear the Apple workstation chip will be a little different from the mobile chip.
All modern chips are SoCs, and have been for a very long time. If they split CPU and GPU, they will still be SoCs.