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Can you get that down to low latency? Say less than 1ms for the hops?

No, at least not with current stack. Each hop adds big overhead

Well, you can get close if you pull ethernet to the APs.

Then you don't have the hops, and the question was about that..

Yes if I have an ethernet cable in each room, I just extend that to the device. Palaces may be exceptions to that.

But you can't extend that cable to a mobile phone or a VR headset, in which case high-speed low-interference access points could prove useful.