You are far from alone! I posted the other day in another thread here after a five year absence. I invested countless thousands in PC hardware, flight yoke & rudder pedals, throttle quadrants, and who knows how much in aftermarket payware from complex aircraft to airport scenery and ground textures to weather. Started with FS98 in 1999, finished with FSX in 2015. I still remember my last FSX flight with Carenado's Phenom 100 before packing everything up and moving. Then life changes meaning priorities change. It happens to real world private pilots too (and I'm one of them as well).
In any event, I have already set aside a budget for a ground up new build and new hardware (I sold it all several years ago). However, not having a clue what we are looking at for a roadmap on where FS will be going into next year and beyond and hardware and software (payware) expectations and openness, I think I'm just going to go with a budget build and reinstall all over again FSX and all of my aftermarket payware.
I am a little concerned about MS's adaptation of FS to the Xbox however. I hope power PC users can take advantage of that power in settings and aftermarket upgrades long term. I'm also concerned about MS's servers being capable of what they are about to experience in demand and users not experiencing stutters no matter how fast their network is.