Personally I don't see what a new system builder guide would do differently. Nothing that's come out in the last four months has any bearing on the price/performance brackets that the TR guide covers.
Very true. For all the hype that was generated for Threadripper and i9, they are almost completely irrelevant to 99.9% of computer users. Techreport has never really focused on products in that range because most of them aren't any better for "normal" enthusiasts (not professionals) than the latest i5 or i7 K.