Are you telling me requiring z370 for Coffee Lake is not just a unecessary opportunistic money grab by a evil and greedy corporation? There is actually an engineering need for it?
I for one am shocked and have not been shouting this for months!
/s
The people who say this is a money grab don't know what they're talking about. Intel makes peanuts per PCH sale and I doubt those WiFi and Ethernet chips are big money makers either. Anything that Intel can do to stimulate sales of these ultra high end enthusiast chips (yes, things like 8600K and 8700K are far more expensive than the average Intel chip sold) it will do.
If Intel loses one 6-core CFL sale because of the motherboard incompatibility, then it'd take a LOT of PCH chip shipments to make up the difference.
The platform change is done to wring out the maximum performance from the 6 core chips when overclocked, and probably to allow for support of the 8 core CFL-S SKU, too, which would definitely need much more robust power delivery than a dinky four core chip.
Some people just want to hate on Intel, and being so emotionally invested in showing Intel as the "bad guy" will lead them to erroneous conclusions and poor market insights time and again.