Here’s why Apple put a Thread radio in the iPhone 15 Pro
www.theverge.com
Could Thread one day replace Bluetooth in Apple’s ecosystem?

The iPhone could be a Thread border router, but it probably shouldn’t be

The iPhone could control Thread smart home devices faster

Thread could replace Bluetooth as a way to connect peripherals like the Apple Watch to your iPhone

Thread would be fine for most smartwatch uses but not for audio streaming

Thread might just be a bonus radio