The Banana Pi BPI-M7 single board computer is equipped with up to 32GB RAM and 128GB eMMC flash, and features an M.2 2280 socket for one NVMe SSD, three display interfaces (HDMI, USB-C, MIPI DSI), two camera connectors, dual 2.5GbE, WiFi 6 and Bluetooth 5.2, a few USB ports, and a 40-pin GPIO header for expansion.
It looks like it’s ~$100. But when I’ve used similar SBCs in the past the issue ends up being drivers. Even if something is faster and better specced than a RasPi, you end up outside that ecosystem with very little in the way of support for whatever oddball hardware your board has.
I have a BananaPi M3 and the software support was horrific. Getting a kernel to compile with the hacked drivers and firmware was like black magic.
Orange pi worked quite well but I mostly used python & GPIO.
Oh yeah, I had to debug and recompile that GPIO lib so no it was kind of not very user friendly…
For $100 you can buy a micro form factor Optiplex PC which has several orders of magnitude more computing power, but it does have a bit larger form factor and less ports than what OP listed.
And power, that’s a pretty important metric if you plan on running something 24/7.
Yeah, I’ve mostly given up on Pis at this point.
Your OptiPlex will have considerable PCIE expansion though, so you could slot in a second hand dual-port nic if you wanted to (10GbE might be easier to find than 2.5 and they are still relatively inexpensive as second hand hardware)
The RPi does have a nice ecosystem but the trick is to pick a board supported by Armbian - that will ensure future kernel updates and low level things working fine. For instance I’ve been using a NanoPi M4v2 since 2018 with a RK3399 CPU mind that at that time it already had a PCIe x2 interface, 4GB of RAM and was cheaper than the Raspberry Pi 3 Model B+ from the same year that had Ethernet shared with the USB bus.