There have been a lot of performance optimizations. I doubt, that the numbers from 5 years ago still apply.

I would recommend to not overuse splitters and balancers anyway, but it only matters, when scaling pretty big. I would really avoid huge balancers, because they are not really needed most ...

As far as I know, splitters consume UPS quite a lot in the past. According to this post, a balancer requires about three inserter-equivalent UPS cost. It seems that the amount is not that huge, but is the cost still correct?

Could you add a one-time request feature for space forms? This is how it works.

There are items that do not need consecutive delivery. For example, I want to add 4 rocket silos on Vulca. So I added 4k concrete on a spaceship that connects Naubis and Vulca. (Vulca is producing other items.) After ...