AMD does do semi-custom work.

Whats to stop sony being like we dont want UDNA 1, we want a iteration of RDNA 4.

For all we know, it IS RDNA 5... it just wont be available to the public.

And their half step/semi-custom work can find their way back to APUs. RDNA 3.5 (the version marketed as such) is in the Zen 5 APUs with Mobile oriented improvements. It wouldn’t surprise me if a future APU gets RDNA 5. GCN had this sort of APU/Console relationship as well.

	▲	cma 2 days ago \| parent [-]
		Also steamdeck before the OLED version and magic leap 2 shared a custom chip, with some vision processing parts fused off for steamdeck.