Snapdragon Dev Kit for Windows - the fastest X Elite, tested
Update - October 17: Today Qualcomm cancelled all remaining orders, and will no longer support the Dev Kit.
I have mixed feelings publishing this post: many developers who are actively trying to port their Windows software to Arm are still awaiting shipment of their own Snapdragon Dev Kits, and I seem to be one of the first few people to receive one.
Everyone I've been in contact with also ordered the Dev Kit on July 16, but we've all been waiting for it to ship—for months.