If it’s just USB 2, wouldn’t that be slower than WiFi in a lot of cases? Maybe not in a crowded area (like offices, which is probably a representative environment for a lot of developers purchasing this), but if you’re in short range of an AP you should be able to get over 500Mbps. Apple also likes to use WiFi direct, such as in airdrop, which can cut the AP out for shorter distance and therefore faster speeds.