I actually switched away from a UDM after finding out that I could only hit 500 Mbit/s uplink (out of ~930) due to a PPPoE performance bug as there's no hardware offloading and the old Cortex-A57 cores (in a SoC from a vendor now owned by Amazon, so extremely end-of-life) just couldn't handle that.
Now I'm running a Turris Omnia with the bundled OpenWRT fork for router tasks and that seems to work fine.
Now I'm running a Turris Omnia with the bundled OpenWRT fork for router tasks and that seems to work fine.