The only thing I've found that is acceptable to me is this: https://mikrotik.com/product/hap_ac2 (or "RBD52G-5HacD2HnD-TC", ... damn, don't they love the long-ass names). 128 MB RAM, Qualcomm processor quad core at 700 MHz (but ARM! :) ) and 5 gigabit RJ45 ports + Dual Band WiFi and a USB port! Plus, even if I can't get OpenWrt to work on it (though I prefer it), I can find my way with Mikrotik's RouterOS. I actually recently setup a PTP link at 3 km with 2 SXTsq's. Though I expected 100 Mbps, it only ended up being 72 Mbps stable, more than that and there's problems with the connection. I liked the old SXT more, you could put OpenWRT on it, the new ones use weird flash memory which OpenWrt can't write to...

edit: forgot to mention, it's 60€ brand new from a friend who works at a WISP