New OS = old beloved software dysfunctional now = opportunity for developer of old software to restart sales, if they're still around = everybody tied to M$ for eternity, whether they like it or not.

Don't tell me the super duper multi-windowed multi-tasking all-encompassing parallel processing cross-threading monster Windows 7 platinum ultimate diamond grade software is unable to lower itself to execute a simple where-it-all-started 8-bit program.

Now RealFlight, Aerofly, etc etc has an opportunity to revive stagnant sales because the old stuff doesn't work on the new OS.

It's simply all about the money, as stated here previously.