After 2 months of a complete break from this sim and I think two new SU and one WU I tried the sim again today. Unbelievable that the CTDs and Lagging is still an issue after they have stated to be working on it for the last updates already. Only thing I noticed was that the graphics got drastically worse while not saving any load and we still have same performance penalties like before.
It seems to me that going short to medium range with a max. of about 3 - 3.5 hours flight time is fine but everything above impossible. Just tried a long-haul with the a320 neo and after approx. 4 hours it started with lagging voices from atc, lagging sound from engines, stuttering world, fps drop from 40fps to < 10 and here we are CTD.
Checked the system as I noticed those typical omens we all know very well by now and everything looked fine. Only thing noticable was that only one cpu core is fully exhausted while others are not - which has also been discussed a lot here. It is just frustrating if only thing possible seems to be bush pilot missions with a light aircraft for 1 or 2 hours but no airliner missions possible after 2 years - what a shame.
Think I will leave it for good some more months but I doubt it will ever change and finally work