Jumping to a wider memory bus is most feasible in product segments that already use soldered CPUs and RAM. PCs have been reluctant to drop the sockets/slots until recently, and only then in thin and light laptops. In systems that don't have discrete GPUs, Intel hasn't been applying competitive pressure against AMD's integrated GPUs.
So it's really been a question of whether AMD could spare the cash to tape out a larger laptop chip with the goal of cutting off the low end of NVIDIA's dGPU sales for laptops.
So it's really been a question of whether AMD could spare the cash to tape out a larger laptop chip with the goal of cutting off the low end of NVIDIA's dGPU sales for laptops.