Disappeared from where?
It was probably not a product that would bring money in so Arduino stopped producing it; its status is Retired on the https://docs.arduino.cc/retired/other/arduino-materia-101-assembled/
Disappeared from where?
It was probably not a product that would bring money in so Arduino stopped producing it; its status is Retired on the https://docs.arduino.cc/retired/other/arduino-materia-101-assembled/