It will be to the advantage of WTR if TK can release his Win 10 compatibility version of SF2 fairly soon and it doesn't break any of the work that has been done while possibly improving performance.
As the YAP owner/manager died, can it still be purchased and delivered, or did YAP die with John Shelton? I wouldn't build WTR around any YAP limitations, as it best it was only supported by WOV and was partially broken by the final WOV patch level, necessitating YAP 3.
At one time, I was a play tester for this project. I didn't have the time and the progress was incredibly slow. But if it is ever finished and released, I have no problems supporting it. I have in the past and continue to wish the WTR team the best of luck, but having watched many flight sim projects come and go without ever being finished, I have low expectations, but love to be surprised by brilliant success. Prove my lack of optimism is wrong and provide a product that takes my money.