When x79 boards were released, both Intel and MSI boards were using high quality renesas DrMOS from day one, all of them, with VRMs consisting of at least 6 phases just for the CPU cores (excluding the memory controller phases).
Even when Gigabyte messed up, they went with high quality International Rectifier FETs and fixed their mess.
When x99 boards were released, again some companies released boards with high quality IR FETs, or Fairchild DrMOS at reasonable prices.
With Ryzen boards, so far you are expected to pay a large premium to get a board with high quality, powerful VRM. Relatively cheap boards I saw had up to 6 phases for the cores and the memory controller, plus 3 phases max for the integrated GPU... that are not used on the processors released so far.
Considering the common instances of catastrophic failures on motherboard VRMs for previous high end AMD processors, you would think that manufacturers would no longer cheap out on VRM quality and quantity. Well... they did.