The first one is custom USB device support, and it’s a big one. Do you want to build HID devices, or play with MIDI, or do multiple serial streams with help of PIO? Now MicroPython lets you ...
Dataquest predicts that 493m USB enabled peripherals will be shipped in 2003. Supporting data transfer rates of 480Mb/s, USB 2.0 uses are mainly in connecting digital video and still cameras, ...