>and a lot of blink codes when you encounter bad sticks
Which sadly happens quite a lot with ECC DDR4 for whatever reason.
>If you're feeling cheap and are okay with the previous generation, the Haswell/Broadwell-based T7910 is also serviceable
The T5810 is a known machine, very tinkerable, just works with NVMe adapters (they show up as a normal NVMe boot option in UEFI) and even have TPM 2.0 (!!!) after a BIOS update. Overall, they are the 2nd best affordable Haswell-EP workstations after the HP Z440 in my opinion.
>E5 v4 revision CPU
They are less efficient than V3 CPUs due to the lockdown of Turbo Boost, but then again on a Precision you'd have to flash the BIOS with an external flasher regardless to get TB back.