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> Stadiums are pretty much the only place where mmWave in phones makes sense.

And Airports, and Parks, and Ampitheateaters, and Malls, and Theme Parks...

mmWave isn't a general solution, sure. But mmWave is great for anywhere crowded enough to benefit from a DAS setup, and there are a lot of DAS setups around.

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In any case it was a much better solution than band 46 license assisted access LTE-A/NR-U which used unlicensed 5Ghz spectrum shared with wifi. If we want to talk about vaporware/abandoned stuff, this was among the most controversial and least deployed solutions to those areas before mmwave became a thing.

Agreed. Stealing public WiFi spectrum for private LTE was always a terrible idea.

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