Air Combat Simulations will come and go. We hope some of them will stay for some time (DCS Series of course you bunch of big hairy chooks!).
But I'll offer a suggestion, that some time in the future in the world of Open Source you might be flying the descendants of this beautiful lady (and anyone who says she's not will get snotted on their virtual noses. so watch it fella's).
Her "feel of flight" is incomparable, her hi-fidelity pedigree is there for the experience. While the movement has limited Air Combat directions (and that could change!), the only reason it's not there in a mature form is that it hasn't been the abiding interest of it's many and various creators from around the globe. As I said, that could (and should) change!
Enjoy!