I really wouldn’t write off the Shield completely. It’s a few years old, but it works really well. My TVs are all disconnected from my network, and each has a Shield attached. The Shield can stream 4k HDR from Jellyfin, play ad-free YouTube with SmartTubeNext, and handles remote game streaming at 4k/60 with Sunshine/Moonlight. It’s really a versatile little box.
I have a few services running on Proxmox that I’d like to switch over to bare metal. Pfsense for one. No need for an entire 1U server, but running on a dedicated machine would be great.
Every mini PC I find is always lacking in some regard. ECC memory is non-negotiable, as is an SFP+ port or the ability to add a low-profile PCIe NIC, and I’m done buying off-brand Chinese crop on Amazon.
If someone with a good reputation makes a reasonably-priced mini PC with ECC memory and at least some way to accept a 10Gb DAC, I’ll probably buy two.