While I really can’t imagine 10,000 part spaceships and mod support on PS4, its CPU is very sufficient. The reason why consoles are shit lies mainly in their GPU, the processors are fine. Besides, you can run KSP on a Haswell Pentium with integrated graphics and have +40 FPS on full scale textures.

Wrong, you can play KSP on PCs way slower than a PS4. I recall they have plans to port it to PS4 in the near future.