Glad you too can now see where you have been, as well as where you are going
Sounds like you can play the historical and training missions in Win 10 with nothing worse that no debrief and having to retstart BoB2 whenever you get the intermittent Alt+X CTD. Probably, you can also play the campaign, since it autosaves (I believe) every time you accept an offer to fly - at the price of some campaign missions CTD'ing early, others when you exit; in either case the downside being that you have to restart BoB2, reload the autosaved campaign and carry on as if you never flew. Letting the campaign logic determine the result of the mission you just flew, and picking a different 'offer to fly' next time. I suspect many may be keen to hear how you get on, as Win 10 issues may be keeping some players away, possibly needlessly if the inconvenience is bearable in practice.