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Why exactly is (private) cellular 5G apparently "better" than Wifi (at least for some use-cases)? Is it the frequencies used? The encoding? Something higher up in the stack (like authentication or better hand-offs or cell overlap)?

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Licensing by the FCC as to the amount of power allowed, which makes it work for more people over a wider area than 802.11 wifi.

I would think that private 5G cellular would also be power-limited so as to not disrupt public cellular, so you'd have to set up multiple cells just like you have to setup multiple APs.

Yes it totally just becomes a numbers game.

Setup W 5-g hotspots for $X dollars vs setting up Y 802.11 hotspots for $Z dollars.

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