The Samsung UE48JS8580 supports an 802.11n WiFi standard which is newer than most 4K and 8K TVs that have been available for a comparable time to it. Most 4K and 8K TVs that were released around the same time as it support an 802.11a WiFi standard. In addition, this television support 802.11ac and 802.11b and 802.11g WiFi standards.
This TV's WiFi standard (802.11n) is actually the best supported WiFi standard amongst all 4K and 8K TVs that have been around for around the same time as the UE48JS8580.
The worst supported WiFi standard amongst comparable types of TV is 802.11a.