Did you read their Conclusion paragraph? They agree with you, as do I.
As for voltages on TR: I'm assuming TR has the same "issue" that Ryzen has sometimes when it just refuses to hit 4GHz unless you really abuse it. Others do 4.0 and even 4.1 with comparative ease. It seems both GamersNexus and Tom Logan over at oc3d.net have had major problems with that 4GHz wall lately. Silicon lottery at play, I'm sure.
This.
Here's a quote from the Threadripper Builder's thread.
The board suits my purposes fine.
I only have a corsair 115i AIO on hand to use and I believe that's holding the higher oc back.
4GHz is the end of the line for these chips. It may go higher but stability is questionable and it may seem stable but with 16 cores/32 threads it can be challenging to keep the processor busy enough to stress it to show instability. Some are pushing 1.45+ volts. YIKES! If that's your thing and you have a TR4 block designed to cool these chips and can handle TDP values over half a kilowatt then the Zenith is THE board to use as its VRM can handle the power.
It's rare for a CPU to go. I had an Asus Rampage X99 that killed a 5960X due to the BIOS bug that fed the chip over 1.8V on POST! That board still works but has all sorts of issues.
Both of my Zenith boards have cold boot problems when the PSU is turned off they go through a few ON OFF cycles before posting.
Aside from that they are fine.
On the issue of stability, besides the memory related crashes some users in that thread experienced from trying to run memory at 3600Mhz CAS 16, most of the 4Ghz overclocks in that thread won't pass a Y-Cruncher stress test because they're running borderline overclocks and yet are unwilling to go over a certain voltage limit (1.4v or so). The reviews in question have no such problems pushing the voltages. They're not worried about long term overclocks, just what these threadripper chips would need to run at that satisfying, albeit borderline 4Ghz mark for their testing purposes, I suppose. See quoted post above. True stability for threadripper at 4Ghz comes at a steep power price.
Intel's AVX-512 gobbling chips get a bad rap for power consumption when none of that is the case in real, everyday use.
Edit: Sorry guys, this is going to be my last post about threadripper in this thread.