It doesn't make sense to centrally build on belts. At high volumes where trains become more common it can be useful to move to buffer systems dedicated to circu

It doesn't make sense to centrally build on belts. At high volumes where trains become more common it can be useful to move to buffer systems dedicated to circuits. It highlights what resources you're short on more obviously (steel or copper). Sometimes with caching it makes more sense to consolidate. Sometimes the scale can cause latency issues! It's about balancing tradeoffs