Yea, right after purchasing the CYVR I applied the memory tweak and took off with my flight in hopes of success, those hopes were short lived, on final approach to CYVR my game has crashed. Hopefully lowering settings to 1024 in FSX.cfg will do the trick.
If, with "memory tweak", you mean setting the texture size options to values lower than 4096 (the previous 1.0 default) in the 1.1 CYVR installer, if you are still getting OOM after that, there's something else you are running which is really eating all your memory, since CYVR with lower settings (such a 2048 for ground and 1024 for dynamic shadows) takes about the same memory as KLAX.
By the way it takes quite a while for the OOM to happen, therefore the demo could have never warned us about it.
Since the OOM is not CAUSED by CYVR, the demo surely doesn't know if you are going to have an OOM after it has expired.
I'm sorry, but the OOM problem, which was NEVER a problem with CYVR, is entirely fixed now. Not because there was something to fix or the scenery had anything "wrong" in the first place, but because you now have the ability with the installer to make CYVR a bit smaller, to make more space for other add-ons you use.
What causes an OOM is the TOTAL amount of things installed, it's never a single add-on, there's nothing else add-ons can do, other than giving you OPTIONS to lower their footprint, which is exactly what the 1.1 installer does.