It's sure Teacup developers take great care of code quality.
Perfection (in design) is achieved not when there is nothing more to add, but rather when there is nothing more to take away. Teacup is known to run on RAMPS, Generation 7 Electronics, SinapTec, the Teensy2, Teens圓, Generation 6 Electronics, Sanguinololu, Generation 3 Electronics, NanoHeart and for all other RepRap controllers it should be a matter of adjusting the pin mapping to get it running. It was RepRap's first firmware to feature acceleration, the first being ported to an ARM-based controller and continues to be excellent at what it does. Teacup Firmware is a RepRap firmware with emphasis on performance, stability, code cleanliness and simple usage.