I'm sorry, but the XsX design is far from lazy! In reality, it is a far cleverer design, and you only need to see the teardown to see how much thought has gone into it and how it is put together, and particularly around noise minimisation.
I don't agree that Sony have taken the simple approach either - a big HSF and loads of space suggests brute force cooling (and that brings it's own issues). I would suggest that the PS5 design is less clever and more overengineered with too many parts and design features (if anything) - most designers and manufacturers will tell you simple is simply better.........which is why every subsequent iteration of the PS5 will be a simplification. Having said that, I find their choice of a centrifugal fan to be a refreshing change from the normal axial design choice, and I'm curious to see how it performs over the longer term.