Data types aren't a problem, but Pro introduced specific SIMD extensions for matrix math that aren't in 'standard' RDNA shader ISA.
Kepler was likely referencing this may be absent(it certainly won't be in standard RDNA5).
Flipside is of course that PS4Pro had similar custom instructions and flags that don't exist in other GPUs , and so did 1X and both were brought forward into their successors.
Likewise I expect Magnus to inherit Series X custom ops(assuming MS doesn't pull the plug).
Could the PS5 pro be an exception to that trend? Sure, but really no way of knowing until ps6 chips come out.