I've been using TrueNAS for six years already. I've built a custom server - Intel dual core Atom CPU - Passive cooling for the CPU, two fans for the HDDs - A

I've been using TrueNAS for six years already. I've built a custom server - Intel dual core Atom CPU - Passive cooling for the CPU, two fans for the HDDs - A small Supermicro motherboard with IPMI and six SATA connectors - 16 gigabytes of ECC RAM - Six 14 terabyte hard disks - Fractal Design Node case - ZFS with RAIDz2 But this setup is getting old, I've had a few errors already from the CPU. My plan next year is to build a rack server with a modern AMD Ryzen CPU, 64 GB of RAM, Proxmox with TrueNAS scale in a virtual machine and re-use the disks I have in the current setup. Proxmox is much nicer for virtual machines and LXC, and if you need Docker, you can run them in the TrueNAS Scale VM.