Other topics elsewhere have discussed “Game or Simulation” extremely well. I think there are potentially three other ways MSFS can be used: aerobatics, training, and marketing.
Aerobatics: There are at least four aircraft in MSFS designed for aerobatics. MS must have a reason for having all these aircrafts even though it is impossible for any simulator to simulate the G-forces that happen. If you’ve never tried it, aerobatics are aircraft maneuvers very difficult to learn and perform correctly all the time. I have not seen very many discussions about aerobatics here or in other forums. Personally I know very little about aerobatics and find there aircraft difficult to control. IRL I’ve enjoyed watching aerobatic performances at air shows. I wonder if MSFS multiplayer is capable of hosting aerobatic air shows maybe live streamed. Anyone interested?
Training: Many years ago when I was studying for my PPL, I was hoping that my MS Flight Sim hours would somehow count towards the hours I needed. However, the FAA has to certify simulators before they are permitted as part of flight training. None of the MS flight simulators have ever been certified nor do I think they ever will be. MSFS is not designed specifically for flight training. However, it can and is used to learn about flying and aviation. I think my use of a flight simulator saved me an hour or two of instruction because my CFI didn’t have to explain the controls and radios from ground zero. Also, I used my simulator to “pre-fly” my solo cross country which was very helpful. Since MSFS was released there have been many educational videos for MSFS on YouTube. Content creators should tag videos for PPL, IFR, Commercial, or ATP ratings or at least beginner, intermediate, or advanced.
Marketing: MSFS is a aircraft manufacturer’s dream. It is an economical way to showcase their aircraft editing out the MSFS bugs in promotional videos. Many photos that have been taken are stunning and worthy of being published on manufacture’s web sites or in brochures.
Another topic not discussed very much is the recent category established for “Light Sport Aircraft” (LSA) and pilot’s license. European countries have a similar category. MSFS includes a number of aircraft designed for LSA requirements. For anyone interested in flying inexpensively, take a look at LSA. A good example is the Icon A5 include in MSFS which can land on water and land. Its wings are collapsible and the Icon can be put onto a trailer and stored in a garage (not simulated in MSFS) saving hangar or tie-down costs. I wonder if flying a LSA in MSFS has sparked interest in flying one IRL.
I’m sure there are other uses for MSFS I haven’t considered.