Bad reviews on Amazon — which is notorious for having unreliable reviews. I checked FakeSpot (owned by non-profit Mozilla/Firefox) and there aren't enough reliable reviews for them:
I've been following this topic (the one we're reading) and this topic for a while and it seems the community really likes GL-iNet's products. I got a MT3000 and love it, and plan to get a MT6000 in future unless/until an affordable Wifi 7 OpenWrt-compatible router presents itself.