TSO only matters for programs that are internally multithreaded or which run multiple processes that have shared memory segments. Most legacy programs like Vis

TSO only matters for programs that are internally multithreaded or which run multiple processes that have shared memory segments. Most legacy programs like Visual Basic 6 are not of this kind. For any other kinds of applications, the operating system handles the concurrency and it does this in the correct way for the native platform. Nevertheless, the few programs for which TSO matters are also those where performance must have mattered if the developers bothered to implement concurrent code. Therefore low performance of the emulated application would be noticeable.