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This doesnt really surprise me - Apple has a history of implementing, or moving to, standards for their platform features in Safari. I think about Apple Pay for web - it started out as a proprietary API, and then the Payment Request API standard was developed and they added support for that. It's in Apple's interest to help develop and support standards like this because they mean more adoption of their platform feat…
I am still waiting for them to move to USB-C
What do you mean? All Mac models introduced since 2016 support USB-C.