The purpose, this is the good point, but what it mean.
The example of good purpose is powerstation. With rule you can set that, without electricity, some things don't work.
Bad example: trains works nonstop without consuming fuel.
Now we have the chain: production, transport, consume, waybills, scores. The first four use quantity (tones, litres, items) but Scores are not connected with this chain ( of course if they work, in TS12 they don't).
Our challange in the session is limited with the time and scores. I think that's enough, i don't like that we would have money involved.
When the cargo is delivered we have no information, we need popup window, that delivered was made, e.g. 60 items of general goods was delivered in Warehouse XY (60/240). scores 60, all scores 60/2000.
MounE is talking about short sessions, it's no need, in Schedule library we can make the different schedules for one train, it's only the matter of timing.
It seems that in big route we must learn to use save after two, three hours running.
For reflection