Oh! That makes more sense. I tried to figure that out, but even TP-Link's official page for it is pretty unhelpful. I guess you have to work backwards from the "AC 1750,“ which seems obvious now.
I have an A7 now, so i guess a RAX20 wouldn't be much of an upgrade, except for (hopefully) faster...
Hey, I hope it's OK to mention this here - the Netgear RAX20 looks pretty great here, but I remembered I'd seen it panned elsewhere. Realized that was in Wirecutter's router article...