Integrated Graphic and gamining (lol)
The Z170 board was never stated to support the Skylake CPU. They happened to be compatible. But that is *entirely different* because It was clearly a distinct board, you knew you would have to do a bios update as it was a Z170, not a Z270. If you had a Z170 board, you already had a CPU. Or you knew you were buying the older version and had a way around it. With Raven Ridge, you don't know as it just asks for AM4 motherboards.
DRAM prices have more than doubled since 2016. High demand if you believe the manufacturers on limited capacity. Slow potential for increasing capacity, you don't just knock up new production lines overnight. Even if you could why would you, since you're now making twice as much money as you were 18 months ago on the memory you can actually ship. There are only a few major manufacturers of it as well, none eager or capable of flooding the market to drive down prices. Maybe. The downer of going with the APUs is that they heavily rely on memory performance. Your system memory is now also essentially graphics memory and so you need to pair it with plenty of expensive fast RAM to get the most out of the integrated graphics. Preferably 3000mhz or better. Whereas on the flip side you can use less, slower and much cheaper RAM with a dedicated card and an Intel chop like this for the same results. The price difference probably isn't that big. If DRAM prices weren't so terrible the APUs would be a lot more attractive.
Why is ram so expensive at the moment? Prices seem to have double since I built my last gaming pc!!!
Intel have pretty much thrown in the towel with their integrated GPU efforts - they announced at the end of last year that their 8th gen CPU's will integrate AMD's Vega GPU. I know... sounds like April fools, but many sources on this along with product announcements.