Unlike many others who just released sequels to start their traditional franchise, Microsoft Flight Simulator (Microsoft Flight Simulator) rereleased the same game under the same title, despite often a big leap forward in vision and technology. 

In theory, this is because of how Microsoft markets and sells their other software. 

For example, Microsoft Word and Microsoft Excel are programs without sequels or franchises, only new versions. 

Today, video game series operates in a completely different way because they are seen more as entertainment media than programs, but remember that the 1980s was when the video game industry was in its infancy, and since then, things have changed a lot.