The Ryzen launch was marred with issues. Memory incompatibility was pretty big out of the gate. After updates and such, things improved. Ryzen 2 kept that momentum going and is a great chip for the money without a doubt.You keep talking about "negatives"? If there were so many negatives with Ryzen, even first generation than why did Intel go into full panic mode and up their core counts after a decade of stagnancy? Why do Ryzen cpu's have so much mind share and have sold so briskly?
I dont think Intel panicked, but they did respond. I dont like more cores because half the time they are useless anyway. So it's cool, more cores, but this core war is a bit premature. A quad core with ht/smt is plenty for most users, for gaming etc... and will for the next couple of years. Hopefully with additional availability of inexpensive chips software will catch up sooner than later and make the core war worth it.
As far as boards go, one can also use a $150 board for Intel 9900k as well. It's the CPUs only that cost more.