Short answers, pulled from the story.
The first MSX computer sold to the public was the Mitsubishi ML-8000, released on the 21st of October 1983. This machine marked the official birth of the MSX standard created by Kazuhiko Nishi and Microsoft.
The MSX standard failed to gain significant traction in the United States because it could not compete with the price war led by Commodore. The largest computer market of the time remained locked in proprietary walled gardens that prevented MSX from achieving global dominance.
The partnership between Kazuhiko Nishi and Microsoft ended in 1986 due to Nishi's impulsive decision-making and extravagant spending habits. One final blow was Nishi spending 1 million dollars to build a mechanical dinosaur in Tokyo, which led Microsoft to sever ties and demand over 500,000 dollars.
The MSX standard became the preeminent home computer system in Japan, South Korea, Argentina, and Brazil. It also found unexpected success in the Soviet Union, Cuba, and various Arab countries where classrooms utilized networked Yamaha MSX computers for teaching informatics.
Konami developed the SCC chip in February 1986 to add five additional sound channels to the original MSX audio system. This Large Scale Integration Sound Creative Chip allowed for independent memory mapping and turned the MSX into a powerhouse for music and sound.
The MSX3 computer standard announced by Kazuhiko Nishi in 2022 was halted following his bankruptcy. Plans for the MSX3 included an upgrade cartridge and an IoT device called the MSX0, but the project could not proceed to completion.