Could you add a setting that makes it so items in warehouses spoil a 15% (or even a configurable) amount more slowly? I feel like this makes sense from a realistic point of view--fruits are going to take longer to rot if they are stored in a warehouse instead of on a belt exposed to the elements. It would add some more depth to the mod, and give the player another incentive for storing their items.

Please consider, I really enjoy this mod :D

Unless vanilla factorio allows this, we won't be implementing this feature.
Warehouses are limited on the technical side due to them basically being big boxes - which enables them to be as simple as possible, not cause any extra lag to TPS issues due to code running in the background (they already cause passive TPS problems when you have hundreds of them due to the sheer number of items the inserters have to search through to find empty slots