i think they respect the tradition and will be 3x3 But again, we have to wait to receive the devices
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Consider that 802.11ax 2 Spatial Streams with 160MHz bandwidth gives a max link speed of 2400Mbps (See intel AX200, AX210, Killer AX1650…) so I hope that Apple upgraded its WiFi6 to support 160MHz.
In the new MBP spec page there is written WiFi6 and no WiFi6E so no 6GHz support.