The first event is kicking off with Berlin University of the Arts, followed by 7 other leading academies worldwide!
USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can program it with AVRdude and/or the Arduino IDE (with a few simple config modifications).The bootloader does not affect RAM usage.
#Adafruit trinket wireless pro
The bootloader on the Pro Trinket uses 4KB of FLASH so the maximum sketch size is 28,672 bytes.
#Adafruit trinket wireless code
The USB connection is for uploading new code only.
#Adafruit trinket wireless serial
This is to keep the Pro Trinket small and inexpensive, you can use any FTDI cable to connect to the FTDI port for a Serial connection.