Simplify the following text for a Grade 11 native English-speaking person.
Original: On May 21 , 1984 , during a press conference at which the Atari 7800 was introduced , company executives revealed that the 5200 had been discontinued after just two years on the market .
Simplified: On May 21 , 1984 , during a press conference at which the Atari 7800 was introduced , company executives revealed that the 5200 had been discontinued .