The BPI-R4 is great for use as a 10G WAN router if your ISP uses PPPoE since the network processing engine has hardware acceleration for it.
Unifi released the UCG-Fiber around a year ago that can also apparently finally handle it, but plenty of threads about slow performance with their UDMs since it's entirely done on the CPU [0].
I'm not the biggest fan of OpenWRT and would prefer something like OPNSense, but it's x86 only and good PPPoE performance isn't guaranteed either - need a CPU with good single core performance that costs more than the BPI-R4, or apparently virtualizing OPNSense allows it to process PPPoE with multiple threads.
0: https://community.ui.com/questions/What-is-the-max-performan...
I'm curious why you don't like OpenWRT?
I've found it to be the better choice for x86 hardware, because it performs so much better on older CPUs. FreeBSD has gotten better with driver support, but the Linux kernel in OWRT is just a better base to build off of.
not GP but I've found the install and upgrade experience for OpenWRT on larger machines is not great compared to the alternatives and normal Linux distros, everything is biased towards the use case of occasionally flashing/configuring little systems
I still use it though, can't complain in terms of actual routing/switching
I think OPNsense now supports ARM.
Edit: never mind. Not official images.