It´s been a long time since I decided to wait with flying, mostly because of WASM and some graphic related CTDs in VR.
Since 1.15 (and 1.16) combined with SU4b it works like a charm! 17 hours uninterrupted longhauls like WSSS-KJFK, no stuttering when on ground or in the air. Smoothly like it used to be in XPlane 11 VR.
TRUTH
Yes, the airframe has many bugs and some basic inconsistencies (like f.e. wrong ETA calculations)
BUT
None of these bugs is critical. What is most important, the airframe is flyable again without spending hundreds of hours at gate trying to solve this and that.
SO
Thank you iniBuilds! Once again you have achieved the most desirable feature of a long-haul aircraft - stability.