Ha! Dish "fixed" my workaround. No non-HDR FIFA World Cup, I'm afraid.
I just tried watching some of the 2018 Winter Olympics recordings off of my EHD and they played on my 4K Joey, albeit with "flat" video on my 1080p Sony. No warning about "You can't watch this on this TV" though, which is different.
I see the 2017 LG "B" HDTV is $1499 again now that the 2018 LG sets are out at "normal" MSRP. Hmmm...
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