It's not even a multiple CPU board...
This is indeed a pretty standard (and weak) ARM server build.
You can get the same CPU M128-30 with 128 3ghz cores for under $800 USD.
You can throw two into a Gigabyte MP72-HB0 and fit it into a full tower case easily.
That'd only cost like $3,200 USD for 256 cores.
RAM is cheap, and that board could take 16 DIMMs.
If you used 16 GB DIMM like OP that's only 256 GB of RAM, in a server, it is not that much... only one gig per core... for like $500 USD.
Maybe for a personal build this seems extravagant but it's nothing special for a server.
Would you call Threadripper system "a normal build"? For many people they are normal builds because they need more computing power or more PCIe lanes than "normal user" desktop has.
On the other side you have those who pretend to use raspberry/pi 3 as "an Arm desktop" despite only 1GB of ram and 4 sluggish cores.