Yup, looking at their statement it leaves open a door for Linux. Shipments are expected in the current week so we'll see right away if the boot loaded is locked or not. Yup, I do not expect much on performance side either, Apple is still paying a premium price to TSMC and their architecture has already been proven valid with growing support. It would be cool if with the end of the Qualcomm deal more Chips producers would start adopting Windows On Arm with their current lineup (Mediatek, Samsung etc) in order to provide a new life to the low end segment of the market that is definitively not price2performance competitive with x86.