Hey! Michal from the engineering team behind here. There are some painful experiences from the journey - async in Django, background processing in Python, scaling agent workflows with growing codebase. Happy to talk!
That TrueNAS ARM fork is great. I've set it up in VMWare Fusion on Mac mini M4 and it runs!
With Thunderbolt 4 M.2 NVMe enclosure, you can plug in M.2 SATA adapter to connect 8 SATA III drives. Little Pico PSU to power the HDDs and it makes a really low powered NAS.
My plan is to give TrueNAS a spin with two drives and if it is stable, move everything into it.