THAT, I believe is the problem. Everyone is not experiencing the problem. It would be grand if no-one could complete a flight. Best case would be everybody CTD on every flight. In that case the team could quickly reproduce the error in the lab and eradicate it. Sadly there are millions of users that either are not experiencing the crash or it is so seldom that it does not interfere with their enjoyment to the point they feel the need to report it.
I know the numbers are ambiguous at best, but a few thousand users CTD at mostly random times and places, some at the menu screen, some on the runway, some while using mods, some without, some using high end, complicated control systems and others using keyboard only. There are even CTD that are caused by overclocking and system instability or bad configurations. I could keep throwing variables but simply put, I believe it will be years, if ever, before we see the last CTD post.