The RPi already has add-on boards and a relatively large community compared to new competitors coming to the scene. In a way, it's like comparing the msp430 to

The RPi already has add-on boards and a relatively large community compared to new competitors coming to the scene. In a way, it's like comparing the msp430 to the arduino. The msp430 is arguably better than most of the AVR chips, but they just don't have the hobby mindshare of the arduino community.