LoRa is not fast enough?

Same channel width and power restrictions. The US' 915MHz band is much much better than the EU 869MHz band

Don’t know about the parent, but I found LoRa adequate for (tiny) payloads (sensor data and such) but OTA updates are a PITA without some alternative channel. Speeds are measured in bytes / sec.

No one is using it in real life. It's a super weak hobbyist protocol with a lot of hype and marketing.

Seriously. Only rich nerds in SAN FRANCISCO are using it.