I would like to have an option not only to select different outputs but also choose the channel (red or green) to output to .

This seems pretty pointless. Why would you want this?
If you don't want signals on green wire, just don't connect it.
If you want other data on green wire than red ...

But in most ... 99% of cases .... you're just adding steps to the process of getting the numbers that you actually want, in Vanilla do we actually care about the weight/mass of the items? For me the answer is a clear No... yes it's a more fundamental property but it's also not at all useful on its ...

This might be doable with something comparable to each/every as the index.


Yeah, I could see using Everything to enable a sorted index mode - e.g.:
sort_everything.jpg

If you're already very familiar with the decider combinator's special signals, this seems logical - but it would be hard to ...

The new decider 2.0 is fantastic - being able to independently process red and green inputs is going to simplify a lot of things! I too would like to see this functionality added to the arithmetic combinator, as doing things like "each_red / each_green" is extremely difficult with the current ...