Hi Neil -
the TVS-871T, the TVS-1272T and the TVS-1282T3 are all fantastic boxes that can edit 4K all day long for multiple people. Because Thunderbolt 3 can only be 2 meters away from the workstation, it makes it very impractical to use this. It is so simple to get a small 8 port Netgear 10G switch, and some cheap thunderbolt to 10G boxes, and get 800 MB/sec (you need 143 MB/sec to do Red 6K at 5:1 compression).
I don't understand why this reviewer says that the 1282T is an expensive box - it's $2700 US price, and the larger
TS-1685 (which I truly love - 12 drives, 4 SSD's and free dual 10Gbase-T ports) is only $300 more !. Exactly what is expensive about this, compared to any other shared storage system.
His review and comparison of the Synology is unfair - because if you add 10G port and a minimum of 8 drives to the Synology (and choose the correct model) you will get wonderful results. And while I have never tested the 12 bay Netgear ReadyNAS (which is about $4300) I bet this performs equally well.
The important thing is that high performance shared storage systems have become a commodity item, and are available to anyone at a very affordable price. Prices of thunderbolt adaptors, like the Promise SanLink3 for thunderbolt 3 are now $299 retail, and the new iMac Pro will have free built in 10G ports. It's rumored that QNAP will have a small 8 port 10G switch soon for $290 (no typing error here).
Of course, all the "established manufacturers" will say all of this is junk. I have no idea of how they will stay in business.