Apple is kicking out Intel.
Apple bought Intel's flailing 5G division which had been supported by Apple in the hopes the 5G silicon could be used in SoCs/SIPs for Apple devices.
Apple and Intel added their Thunderbolt partnership to USB Implementers Forum (USB-IF) for the USB 4 standard.
Thunderbolt 1 and 2 used mini DisplayPort connectors; however, Thunderbolt 3 used USB Type-C connectors making it compatible with USB 3.0, 3.1, 3.2 and 4.0 with firmware updates.
“Over a decade ago, Apple partnered with Intel to design and develop Thunderbolt, and today our customers enjoy the speed and flexibility it brings to every Mac. We remain committed to the future of Thunderbolt and will support it in Macs with Apple silicon,” commented an Apple spokesperson, in a statement to The Verge
Apple and Intel tying off all of their loose ends shows we are at the point of limited return before knowing if the switch to Apple Silicon is going to work.