I'm just wildly guessing, but maybe the TS-x77 were a bit to good for their price bracket?
Maybe they've been phased out, in favor of much more expensive Ryzen-Rack-NAS because they where to much bang for the buck and therefore cannibalizing the sales of much more expensive offerings from QNAP?
Qnap could have easily upgraded the TS-x77 to Ryzen 2x00/3x00 if they wanted to even if the Bios-FlashROM is to small to hold the AMD AGESA-Software Zen/Zen+/Zen2.
This could easily fixed by using different ROMs for different CPU-Types, as done by some other Mainboard-Manufacturers e.g Asus, especially since the CPU is officially non-user-replaceable.
Instead QNAP sadly chose to phase out the TS-x77 Series, without presenting any immediate successor.
We are using a TS-677 (upgraded to R7-1700; 64GB; QM2-2P-384 with 2x 1TB Samsung EVO970/RAID1 as System Drive and 3x 1TB Samsung 860EVO/RAID5 for local Backups) as our small business Server, running seven Win10Pro Clients and two Servers Win10Pro and Ubuntu 18.04 LTS. As we don't need tons of storagespace for that task, the TS-677 was a nearly perfect match for our needs.
A comparable Server from Dell/HP/Lenovo would have cost nearly double the price we have paid in late 2018 for TS-677 not including any VMWare vSphere or Veeam Backup Licenses, which are really expensive too.
In the end we bought two of these machines, connected them via QVPN and use the second TS-677 for nightly offsite replication of our business data and spare machine in case the main system fails for any reason.
You get a lot CPU-Power/RAM-Capacity out of these machines, even matching and in a few cases outmatching much more expensive Intel Xeon NAS.
RAM-wise, if you're bold, you can even try to upgrade them to 128GB RAM:
--> https://translate.google.com/translate? ... 76677.html
As the Ryzen Rx-1x00/2x00 CPUs have an integrated memory controller, this should not be Board/Bios/Firmware issue.
On the other hand, QNAP Support is really sh*tty.
We had a malfunctioning CPU fan (bearing defect; loud as f*ck).
Qnap Germany couldn't supply a fan for exchange, nor could they send a technician (we offered to pay for that) to replace it.
Qnap insisted that the fan is not a user replaceable part and the unit has to be sent in for changing the fan under warranty.
Really funny, 'cause you have to dismount the fan-assembly for memory and/or m2. updates (as described in the user manual).... wtf?
Clearly not an valid option for a device marketed as SB-Server/NAS, as QNAP could not even say if this will take 3 days or 3 weeks or 3 month.
In the end i had to source the replacement fan for the defect Y.S.tech Xtreme BD129733LB from Asia, as they were not available in Europe and northern America.