Understood. But, if you are using its iGPU, then the performance benefits of DDR5 are really part of the equation! If you used it with DDR4, iGPU performance would definitely suffer.With the 8600G, we're talking about the lowest-end budget gaming systems that don't even use a GPU—there is a complete and total price sensitivity in that market that simply cannot tolerate expensive RAM.
You shouldn't assume that level of iGPU performance is available without DDR5. So, it should be seen as an intrinsic part of the deal, and not an adjunct.