6 hours of "playtime".
6 hours of Loading Screens and Crashes, because Microsoft refuses to mention that you absolutely cannot have more than 32 Logical Processors / Threads in your System.

Apparently this issue has already been reported during the development Alpha, yet it has neither been fixed, nor even mentioned in the common issues.

If you have this issue, you can temporarily work around this issue, by caping your Logical Processor amount to 32:
msconfig --> Boot --> Advanced --> Check the Processor Limit and set it to 32 --> Reboot.
Be aware that this will disable some cores of your CPU, for the entire System! Remember to turn this back off, when the issue is finally fixed or when you don't play for a while.

As much as I like flight simulator, my review will stay negative until this has been adressed and resolved.