I think there are two kinds of long sentences. One just keeps adding detail. It's essentially a list. Breaking it up into multiple sentences would require a lo

I think there are two kinds of long sentences. One just keeps adding detail. It's essentially a list. Breaking it up into multiple sentences would require a lot of unnecessary conjunctions as you say. The other kind of long sentence forces you to keep a lot in your head until the meaning is finally resolved at the very end. That's the kind of sentence that should be broken up because it creates unnecessary mental burden.