Airport/Scenery updates vs Library updates

Quick question. I have several airports and sceneries that have been updated or have been found to be compatible with SU5 but some of the libraries used in these airports/sceneries have not been confirmed. Right now, I have the airports/sceneries loaded but not some of their required libraries. Am I safe to assume the libraries are compatible with SU5?

If you used items from the libraries, that you had to put in your model for compilation - yes, otherwise, I’m not certain - and I don’t think that anyone is! Some developers say that the SU5/SU6 updates don’t impact scenery addons, but again, nothing definitive appears to have been told to us.
Mushrooms again!

Some sceneries never had to be updated because they were compatible out of the box. Most sceneries using effects or those with not enough LODs for models were affected by SU5 and 6.

For example, I had to update my We Love VFR - Region 2 because it was using effects. But I didn’t need to update Region 1 as it has no effects yet, and LODs were fine.