default.xml (Autogen)

I noticed that default.xml and AutogenDescriptions.spb change often, depending what scenery you install. It's also very hard to check them, like with scenery.cfg.Each scenery might do some change, one over another, etc. Backing up is hard, you would have to check every time you install something.I can only imagine after some time those files become oversized (I noticed now the default.xml is 12mb, and original is 5), I know Grenadines and Santorini change it, but what about all other possibilities?Anyone have any ideas how to caress this?