My NAS set up (DS215j with 2x 3TB WD Red) is getting filled up, thinking of getting another one while converting the original to a backup. Those Ultrastar drives are looking pretty cheap on Amazon, sitting at ~7/T for those 12/14T models.
Still gonna get two drives to try it out if it actually supports it or not though...I don't see any reason for it to support 3TB drives but not 12TB ones.
My WFH set up is Linux running Windows VM RDPing into another Windows machine ssh + X-forwarding to a Linux machine. It's amazing how well it works!
ATH SR9 gives my a lot of sibilance at first - also tried MSR7 and it was even worse, to the degree of not listenable - with burn in and a bit of EQ tweak it gives a really detailed sound. It also feels brighter than ATH CKR100. Female vocals sound irresistible on SR9, but otherwise I do like CRK100 a bit more now.