MSFS 9 (aka 2004) mostly because there are loads of Golden Age and WWI add-ons not tweaked for GenX.
Also, HOP (Heroes of the Pacific). Have tried PF but prefer HOP, little less real, but a little more interesting.
I've run several MSFS over the years, 95, 98, 2000.
Subsimming often seems slow at times......:hmm:
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