I guess there is a difference of thought here...some of us are looking for a ressurection of the old Microprose sort of titles...and some are looking forward to a Warbirds reboot. On the Warbirds front...they never left...they have freshened up versions in 2016 and 2019. I'm not sure where the nostalgia fits in for Warbirds...not much to miss since it's still being actively developed and has been since 1996.
I guess that's because literaly no one is playing Warbirds currently, and a -real- modern version, will be a sort of a reboot. With unreal engine 4 now, it -looks- like it might be the case.