You managed to buy an APU2 or is this existing? They are pretty much uobtanium as of now.
I ran OpenBSD on my now deceased APU2. Never had any issues as it was solid up until it died, likely from lazily leaving it in a room which routinely reaches >90 F / 32 C in the summer. When the stars align and they release the SFP version, I'm going to grab one.