If this was added, it would need to be integrated into Factoriopedia which would be the majority of the work. It would also need to account for a given thing spoiling and having any number of possible results. Right now it's simply a trigger that runs - and can do functionally anything.

It ...

+1

+1

Usually spoiling in the Vanilla game only shows up with biological products, as expected, spoiling into spoilage or other products.

Modders though have used the spoiling feature to show other kinds of processes, from nuclear decay to rusting.

So my suggestion is the addition of spoilage categories ...

Agricultural towers seem to behave oddly when their inventory is almost full and the crop they're harvesting yields multiple items.
After the harvest, the overflow items are dropped on the ground preventing the tower from planting further crops in the area.

The logic behind how agri towers deal ...

With the upcoming ability in 2.1 to increase the maximum weight a rocket can carry (like the 3 ton rocket given as an example in FFF-441), the ability to lock items from being launched into space by giving the item a weight above 1 ton becomes obsolete.

A new boolean "launchable" property could fix ...

I was testing a planet mod i was developing and I ran into a weird issue. A plant I've coded to have negative pollution emissions when harvested does not have this property when harvested by an agricultural tower and not by hand. I do not know what is causing the issue so I am reporting it as a bug ...